3.968 \(\int (a+b x)^2 (a^2-b^2 x^2)^p \, dx\)

Optimal. Leaf size=60 \[ \frac{(a+b x)^2 \left (a^2-b^2 x^2\right )^{p+1} \, _2F_1\left (1,2 (p+2);p+4;\frac{a+b x}{2 a}\right )}{2 a b (p+3)} \]

[Out]

((a + b*x)^2*(a^2 - b^2*x^2)^(1 + p)*Hypergeometric2F1[1, 2*(2 + p), 4 + p, (a + b*x)/(2*a)])/(2*a*b*(3 + p))

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Rubi [A]  time = 0.0289164, antiderivative size = 71, normalized size of antiderivative = 1.18, number of steps used = 2, number of rules used = 2, integrand size = 22, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.091, Rules used = {678, 69} \[ -\frac{a 2^{p+2} \left (\frac{b x}{a}+1\right )^{-p-1} \left (a^2-b^2 x^2\right )^{p+1} \, _2F_1\left (-p-2,p+1;p+2;\frac{a-b x}{2 a}\right )}{b (p+1)} \]

Antiderivative was successfully verified.

[In]

Int[(a + b*x)^2*(a^2 - b^2*x^2)^p,x]

[Out]

-((2^(2 + p)*a*(1 + (b*x)/a)^(-1 - p)*(a^2 - b^2*x^2)^(1 + p)*Hypergeometric2F1[-2 - p, 1 + p, 2 + p, (a - b*x
)/(2*a)])/(b*(1 + p)))

Rule 678

Int[((d_) + (e_.)*(x_))^(m_)*((a_) + (c_.)*(x_)^2)^(p_), x_Symbol] :> Dist[(d^(m - 1)*(a + c*x^2)^(p + 1))/((1
+ (e*x)/d)^(p + 1)*(a/d + (c*x)/e)^(p + 1)), Int[(1 + (e*x)/d)^(m + p)*(a/d + (c*x)/e)^p, x], x] /; FreeQ[{a,
c, d, e, m}, x] && EqQ[c*d^2 + a*e^2, 0] &&  !IntegerQ[p] && (IntegerQ[m] || GtQ[d, 0]) &&  !(IGtQ[m, 0] && (
IntegerQ[3*p] || IntegerQ[4*p]))

Rule 69

Int[((a_) + (b_.)*(x_))^(m_)*((c_) + (d_.)*(x_))^(n_), x_Symbol] :> Simp[((a + b*x)^(m + 1)*Hypergeometric2F1[
-n, m + 1, m + 2, -((d*(a + b*x))/(b*c - a*d))])/(b*(m + 1)*(b/(b*c - a*d))^n), x] /; FreeQ[{a, b, c, d, m, n}
, x] && NeQ[b*c - a*d, 0] &&  !IntegerQ[m] &&  !IntegerQ[n] && GtQ[b/(b*c - a*d), 0] && (RationalQ[m] ||  !(Ra
tionalQ[n] && GtQ[-(d/(b*c - a*d)), 0]))

Rubi steps

\begin{align*} \int (a+b x)^2 \left (a^2-b^2 x^2\right )^p \, dx &=\left (a (a-b x)^{-1-p} \left (1+\frac{b x}{a}\right )^{-1-p} \left (a^2-b^2 x^2\right )^{1+p}\right ) \int (a-b x)^p \left (1+\frac{b x}{a}\right )^{2+p} \, dx\\ &=-\frac{2^{2+p} a \left (1+\frac{b x}{a}\right )^{-1-p} \left (a^2-b^2 x^2\right )^{1+p} \, _2F_1\left (-2-p,1+p;2+p;\frac{a-b x}{2 a}\right )}{b (1+p)}\\ \end{align*}

Mathematica [B]  time = 0.0607434, size = 134, normalized size = 2.23 \[ \frac{\left (a^2-b^2 x^2\right )^p \left (1-\frac{b^2 x^2}{a^2}\right )^{-p} \left (3 a^2 b (p+1) x \, _2F_1\left (\frac{1}{2},-p;\frac{3}{2};\frac{b^2 x^2}{a^2}\right )+b^3 (p+1) x^3 \, _2F_1\left (\frac{3}{2},-p;\frac{5}{2};\frac{b^2 x^2}{a^2}\right )-3 a \left (a^2-b^2 x^2\right ) \left (1-\frac{b^2 x^2}{a^2}\right )^p\right )}{3 b (p+1)} \]

Antiderivative was successfully verified.

[In]

Integrate[(a + b*x)^2*(a^2 - b^2*x^2)^p,x]

[Out]

((a^2 - b^2*x^2)^p*(-3*a*(a^2 - b^2*x^2)*(1 - (b^2*x^2)/a^2)^p + 3*a^2*b*(1 + p)*x*Hypergeometric2F1[1/2, -p,
3/2, (b^2*x^2)/a^2] + b^3*(1 + p)*x^3*Hypergeometric2F1[3/2, -p, 5/2, (b^2*x^2)/a^2]))/(3*b*(1 + p)*(1 - (b^2*
x^2)/a^2)^p)

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Maple [F]  time = 0.488, size = 0, normalized size = 0. \begin{align*} \int \left ( bx+a \right ) ^{2} \left ( -{b}^{2}{x}^{2}+{a}^{2} \right ) ^{p}\, dx \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((b*x+a)^2*(-b^2*x^2+a^2)^p,x)

[Out]

int((b*x+a)^2*(-b^2*x^2+a^2)^p,x)

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Maxima [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int{\left (b x + a\right )}^{2}{\left (-b^{2} x^{2} + a^{2}\right )}^{p}\,{d x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x+a)^2*(-b^2*x^2+a^2)^p,x, algorithm="maxima")

[Out]

integrate((b*x + a)^2*(-b^2*x^2 + a^2)^p, x)

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Fricas [F]  time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left ({\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )}{\left (-b^{2} x^{2} + a^{2}\right )}^{p}, x\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x+a)^2*(-b^2*x^2+a^2)^p,x, algorithm="fricas")

[Out]

integral((b^2*x^2 + 2*a*b*x + a^2)*(-b^2*x^2 + a^2)^p, x)

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Sympy [A]  time = 3.71884, size = 124, normalized size = 2.07 \begin{align*} a^{2} a^{2 p} x{{}_{2}F_{1}\left (\begin{matrix} \frac{1}{2}, - p \\ \frac{3}{2} \end{matrix}\middle |{\frac{b^{2} x^{2} e^{2 i \pi }}{a^{2}}} \right )} + 2 a b \left (\begin{cases} \frac{x^{2} \left (a^{2}\right )^{p}}{2} & \text{for}\: b^{2} = 0 \\- \frac{\begin{cases} \frac{\left (a^{2} - b^{2} x^{2}\right )^{p + 1}}{p + 1} & \text{for}\: p \neq -1 \\\log{\left (a^{2} - b^{2} x^{2} \right )} & \text{otherwise} \end{cases}}{2 b^{2}} & \text{otherwise} \end{cases}\right ) + \frac{a^{2 p} b^{2} x^{3}{{}_{2}F_{1}\left (\begin{matrix} \frac{3}{2}, - p \\ \frac{5}{2} \end{matrix}\middle |{\frac{b^{2} x^{2} e^{2 i \pi }}{a^{2}}} \right )}}{3} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x+a)**2*(-b**2*x**2+a**2)**p,x)

[Out]

a**2*a**(2*p)*x*hyper((1/2, -p), (3/2,), b**2*x**2*exp_polar(2*I*pi)/a**2) + 2*a*b*Piecewise((x**2*(a**2)**p/2
, Eq(b**2, 0)), (-Piecewise(((a**2 - b**2*x**2)**(p + 1)/(p + 1), Ne(p, -1)), (log(a**2 - b**2*x**2), True))/(
2*b**2), True)) + a**(2*p)*b**2*x**3*hyper((3/2, -p), (5/2,), b**2*x**2*exp_polar(2*I*pi)/a**2)/3

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Giac [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int{\left (b x + a\right )}^{2}{\left (-b^{2} x^{2} + a^{2}\right )}^{p}\,{d x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x+a)^2*(-b^2*x^2+a^2)^p,x, algorithm="giac")

[Out]

integrate((b*x + a)^2*(-b^2*x^2 + a^2)^p, x)