2.33.20 Problem 229
Internal
problem
ID
[13890]
Book
:
Handbook
of
exact
solutions
for
ordinary
differential
equations.
By
Polyanin
and
Zaitsev.
Second
edition
Section
:
Chapter
2,
Second-Order
Differential
Equations.
section
2.1.2-7
Problem
number
:
229
Date
solved
:
Thursday, January 01, 2026 at 03:26:31 AM
CAS
classification
:
[[_2nd_order, _with_linear_symmetries]]
2.33.20.1 Solved as second order ode adjoint method
6.842 (sec)
\begin{align*}
\left (a \,x^{2}+b \right )^{2} y^{\prime \prime }+\left (a \,x^{2}+b \right ) \left (c \,x^{2}+d \right ) y^{\prime }+2 \left (-a d +b c \right ) x y&=0 \\
\end{align*}
Entering second order ode lagrange adjoint equation method solverIn normal form the ode
\begin{align*} \left (a \,x^{2}+b \right )^{2} y^{\prime \prime }+\left (a \,x^{2}+b \right ) \left (c \,x^{2}+d \right ) y^{\prime }+2 \left (-a d +b c \right ) x y = 0 \tag {1} \end{align*}
Becomes
\begin{align*} y^{\prime \prime }+p \left (x \right ) y^{\prime }+q \left (x \right ) y&=r \left (x \right ) \tag {2} \end{align*}
Where
\begin{align*} p \left (x \right )&=\frac {c \,x^{2}+d}{a \,x^{2}+b}\\ q \left (x \right )&=-\frac {2 x \left (a d -b c \right )}{\left (a \,x^{2}+b \right )^{2}}\\ r \left (x \right )&=0 \end{align*}
The Lagrange adjoint ode is given by
\begin{align*} \xi ^{''}-(\xi \, p)'+\xi q &= 0\\ \xi ^{''}-\left (\frac {\left (c \,x^{2}+d \right ) \xi \left (x \right )}{a \,x^{2}+b}\right )' + \left (-\frac {2 x \left (a d -b c \right ) \xi \left (x \right )}{\left (a \,x^{2}+b \right )^{2}}\right ) &= 0\\ \xi ^{\prime \prime }\left (x \right )-\frac {\left (c \,x^{2}+d \right ) \xi ^{\prime }\left (x \right )}{a \,x^{2}+b}&= 0 \end{align*}
Which is solved for \(\xi (x)\). Entering second order ode missing \(y\) solverThis is second order ode with
missing dependent variable \(\xi \). Let
\begin{align*} u(x) &= \xi ^{\prime } \end{align*}
Then
\begin{align*} u'(x) &= \xi ^{\prime \prime } \end{align*}
Hence the ode becomes
\begin{align*} u^{\prime }\left (x \right )-\frac {\left (c \,x^{2}+d \right ) u \left (x \right )}{a \,x^{2}+b} = 0 \end{align*}
Which is now solved for \(u(x)\) as first order ode.
Entering first order ode linear solverIn canonical form a linear first order is
\begin{align*} u^{\prime }\left (x \right ) + q(x)u \left (x \right ) &= p(x) \end{align*}
Comparing the above to the given ode shows that
\begin{align*} q(x) &=-\frac {c \,x^{2}+d}{a \,x^{2}+b}\\ p(x) &=0 \end{align*}
The integrating factor \(\mu \) is
\begin{align*} \mu &= e^{\int {q\,dx}}\\ &= {\mathrm e}^{\int -\frac {c \,x^{2}+d}{a \,x^{2}+b}d x}\\ &= {\mathrm e}^{\frac {-c x -\frac {\left (a d -b c \right ) \arctan \left (\frac {x a}{\sqrt {a b}}\right )}{\sqrt {a b}}}{a}} \end{align*}
The ode becomes
\begin{align*} \frac {\mathop {\mathrm {d}}}{ \mathop {\mathrm {d}x}} \mu u &= 0 \\ \frac {\mathop {\mathrm {d}}}{ \mathop {\mathrm {d}x}} \left (u \,{\mathrm e}^{\frac {-c x -\frac {\left (a d -b c \right ) \arctan \left (\frac {x a}{\sqrt {a b}}\right )}{\sqrt {a b}}}{a}}\right ) &= 0 \end{align*}
Integrating gives
\begin{align*} u \,{\mathrm e}^{\frac {-c x -\frac {\left (a d -b c \right ) \arctan \left (\frac {x a}{\sqrt {a b}}\right )}{\sqrt {a b}}}{a}}&= \int {0 \,dx} + c_3 \\ &=c_3 \end{align*}
Dividing throughout by the integrating factor \({\mathrm e}^{\frac {-c x -\frac {\left (a d -b c \right ) \arctan \left (\frac {x a}{\sqrt {a b}}\right )}{\sqrt {a b}}}{a}}\) gives the final solution
\[ u \left (x \right ) = {\mathrm e}^{-\frac {-c x -\frac {\left (a d -b c \right ) \arctan \left (\frac {x a}{\sqrt {a b}}\right )}{\sqrt {a b}}}{a}} c_3 \]
Simplifying the above gives
\begin{align*}
u \left (x \right ) &= {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 \\
\end{align*}
In summary, these are the solution found for \(\xi \) \begin{align*}
u \left (x \right ) &= {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 \\
\end{align*}
For solution \(u \left (x \right ) = {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3\), since \(u=\xi ^{\prime }\) then we now have a new first
order ode to solve which is \begin{align*} \xi ^{\prime } = {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 \end{align*}
Entering first order ode quadrature solverSince the ode has the form \(\xi ^{\prime }=f(x)\), then we only need to
integrate \(f(x)\).
\begin{align*} \int {d\xi } &= \int {{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3\, dx}\\ \xi &= \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x + c_4 \end{align*}
\begin{align*} \xi &= \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c_4 \end{align*}
In summary, these are the solution found for \((\xi )\)
\begin{align*}
\xi &= \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c_4 \\
\end{align*}
The original ode now reduces to first order ode
\begin{align*} \xi \left (x \right ) y^{\prime }-y \xi ^{\prime }\left (x \right )+\xi \left (x \right ) p \left (x \right ) y&=\int \xi \left (x \right ) r \left (x \right )d x\\ y^{\prime }+y \left (p \left (x \right )-\frac {\xi ^{\prime }\left (x \right )}{\xi \left (x \right )}\right )&=\frac {\int \xi \left (x \right ) r \left (x \right )d x}{\xi \left (x \right )} \end{align*}
Or
\begin{align*} y^{\prime }+y \left (\frac {c \,x^{2}+d}{a \,x^{2}+b}-\frac {{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3}{\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c_4}\right )&=0 \end{align*}
Which is now a first order ode. This is now solved for \(y\). Entering first order ode separable
solverThe ode
\begin{equation}
y^{\prime } = -\frac {y \left (-{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 a \,x^{2}+c \,x^{2} \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c \,x^{2} c_4 -{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 b +d \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +d c_4 \right )}{\left (a \,x^{2}+b \right ) \left (\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c_4 \right )}
\end{equation}
is separable as it can be written as \begin{align*} y^{\prime }&= -\frac {y \left (-{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 a \,x^{2}+c \,x^{2} \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c \,x^{2} c_4 -{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 b +d \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +d c_4 \right )}{\left (a \,x^{2}+b \right ) \left (\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c_4 \right )}\\ &= f(x) g(y) \end{align*}
Where
\begin{align*} f(x) &= -\frac {-{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 a \,x^{2}+c \,x^{2} \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c \,x^{2} c_4 -{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 b +d \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +d c_4}{\left (a \,x^{2}+b \right ) \left (\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c_4 \right )}\\ g(y) &= y \end{align*}
Integrating gives
\begin{align*}
\int { \frac {1}{g(y)} \,dy} &= \int { f(x) \,dx} \\
\int { \frac {1}{y}\,dy} &= \int { -\frac {-{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 a \,x^{2}+c \,x^{2} \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c \,x^{2} c_4 -{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 b +d \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +d c_4}{\left (a \,x^{2}+b \right ) \left (\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c_4 \right )} \,dx} \\
\end{align*}
\[
\ln \left (y\right )=\int -\frac {-{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 a \,x^{2}+c \,x^{2} \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c \,x^{2} c_4 -{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 b +d \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +d c_4}{\left (a \,x^{2}+b \right ) \left (\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c_4 \right )}d x +c_5
\]
We now need to find the singular solutions, these are found by finding
for what values \(g(y)\) is zero, since we had to divide by this above. Solving \(g(y)=0\) or \[
y=0
\]
for \(y\) gives
\begin{align*} y&=0 \end{align*}
Now we go over each such singular solution and check if it verifies the ode itself and any initial
conditions given. If it does not then the singular solution will not be used.
Therefore the solutions found are
\begin{align*}
\ln \left (y\right ) &= \int -\frac {-{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 a \,x^{2}+c \,x^{2} \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c \,x^{2} c_4 -{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 b +d \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +d c_4}{\left (a \,x^{2}+b \right ) \left (\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) a d -\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c +c x \sqrt {a b}}{a \sqrt {a b}}} c_3 d x +c_4 \right )}d x +c_5 \\
y &= 0 \\
\end{align*}
Solving for \(y\) gives \begin{align*}
y &= 0 \\
y &= {\mathrm e}^{c_3 a \int \frac {{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}} x^{2}}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x +c_3 b \int \frac {{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -c c_3 \int \frac {x^{2} \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -d c_3 \int \frac {\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -c c_4 \int \frac {x^{2}}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -d c_4 \int \frac {1}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x +c_5} \\
\end{align*}
Hence, the solution found using Lagrange
adjoint equation method is \begin{align*}
y &= 0 \\
y &= {\mathrm e}^{c_3 a \int \frac {{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}} x^{2}}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x +c_3 b \int \frac {{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -c c_3 \int \frac {x^{2} \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -d c_3 \int \frac {\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -c c_4 \int \frac {x^{2}}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -d c_4 \int \frac {1}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x +c_5} \\
\end{align*}
Summary of solutions found
\begin{align*}
y &= 0 \\
y &= {\mathrm e}^{c_3 a \int \frac {{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}} x^{2}}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x +c_3 b \int \frac {{\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -c c_3 \int \frac {x^{2} \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -d c_3 \int \frac {\int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -c c_4 \int \frac {x^{2}}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x -d c_4 \int \frac {1}{\left (a \,x^{2}+b \right ) \left (c_3 \int {\mathrm e}^{\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) d}{\sqrt {a b}}} {\mathrm e}^{-\frac {\arctan \left (\frac {x a}{\sqrt {a b}}\right ) b c}{a \sqrt {a b}}} {\mathrm e}^{\frac {c x}{a}}d x +c_4 \right )}d x +c_5} \\
\end{align*}
2.33.20.2 ✓ Maple. Time used: 0.055 (sec). Leaf size: 818
ode:=(a*x^2+b)^2*diff(diff(y(x),x),x)+(a*x^2+b)*(c*x^2+d)*diff(y(x),x)+2*(-a*d+b*c)*x*y(x) = 0;
dsolve(ode,y(x), singsol=all);
\begin{align*} \text {Solution too large to show}\end{align*}
Maple trace
Methods for second order ODEs:
--- Trying classification methods ---
trying a quadrature
checking if the LODE has constant coefficients
checking if the LODE is of Euler type
trying a symmetry of the form [xi=0, eta=F(x)]
checking if the LODE is missing y
-> Trying a Liouvillian solution using Kovacics algorithm
A Liouvillian solution exists
Reducible group (found an exponential solution)
Group is reducible, not completely reducible
Solution has integrals. Trying a special function solution free of integrals\
...
-> Trying a solution in terms of special functions:
-> Bessel
-> elliptic
-> Legendre
-> Whittaker
-> hyper3: Equivalence to 1F1 under a power @ Moebius
-> hypergeometric
-> heuristic approach
-> hyper3: Equivalence to 2F1, 1F1 or 0F1 under a power @ Moebius
-> Mathieu
-> Equivalence to the rational form of Mathieu ODE under a power @ Mo\
ebius
-> Heun: Equivalence to the GHE or one of its 4 confluent cases under a \
power @ Moebius
<- Heun successful: received ODE is equivalent to the HeunC ODE, case \
a <> 0, e <> 0, c = 0
<- Kovacics algorithm successful
2.33.20.3 ✓ Mathematica. Time used: 60.09 (sec). Leaf size: 104
ode=(a*x^2+b)^2*D[y[x],{x,2}]+(a*x^2+b)*(c*x^2+d)*D[y[x],x]+2*(b*c-a*d)*x*y[x]==0;
ic={};
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
\begin{align*} y(x)&\to \exp \left (\frac {\arctan \left (\frac {\sqrt {a} x}{\sqrt {b}}\right ) (b c-a d)}{a^{3/2} \sqrt {b}}-\frac {c x}{a}\right ) \left (\int _1^x\exp \left (\frac {(a d-b c) \arctan \left (\frac {\sqrt {a} K[1]}{\sqrt {b}}\right )}{a^{3/2} \sqrt {b}}+\frac {c K[1]}{a}\right ) c_1dK[1]+c_2\right ) \end{align*}
2.33.20.4 ✗ Sympy
from sympy import *
x = symbols("x")
a = symbols("a")
b = symbols("b")
c = symbols("c")
d = symbols("d")
y = Function("y")
ode = Eq(x*(-2*a*d + 2*b*c)*y(x) + (a*x**2 + b)**2*Derivative(y(x), (x, 2)) + (a*x**2 + b)*(c*x**2 + d)*Derivative(y(x), x),0)
ics = {}
dsolve(ode,func=y(x),ics=ics)
False