3.668 \(\int x^2 (A+B x) (a^2+2 a b x+b^2 x^2)^{3/2} \, dx\)

Optimal. Leaf size=210 \[ \frac{b^2 x^6 \sqrt{a^2+2 a b x+b^2 x^2} (3 a B+A b)}{6 (a+b x)}+\frac{3 a b x^5 \sqrt{a^2+2 a b x+b^2 x^2} (a B+A b)}{5 (a+b x)}+\frac{a^2 x^4 \sqrt{a^2+2 a b x+b^2 x^2} (a B+3 A b)}{4 (a+b x)}+\frac{a^3 A x^3 \sqrt{a^2+2 a b x+b^2 x^2}}{3 (a+b x)}+\frac{b^3 B x^7 \sqrt{a^2+2 a b x+b^2 x^2}}{7 (a+b x)} \]

[Out]

(a^3*A*x^3*Sqrt[a^2 + 2*a*b*x + b^2*x^2])/(3*(a + b*x)) + (a^2*(3*A*b + a*B)*x^4*Sqrt[a^2 + 2*a*b*x + b^2*x^2]
)/(4*(a + b*x)) + (3*a*b*(A*b + a*B)*x^5*Sqrt[a^2 + 2*a*b*x + b^2*x^2])/(5*(a + b*x)) + (b^2*(A*b + 3*a*B)*x^6
*Sqrt[a^2 + 2*a*b*x + b^2*x^2])/(6*(a + b*x)) + (b^3*B*x^7*Sqrt[a^2 + 2*a*b*x + b^2*x^2])/(7*(a + b*x))

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Rubi [A]  time = 0.0870089, antiderivative size = 210, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 2, integrand size = 29, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.069, Rules used = {770, 76} \[ \frac{b^2 x^6 \sqrt{a^2+2 a b x+b^2 x^2} (3 a B+A b)}{6 (a+b x)}+\frac{3 a b x^5 \sqrt{a^2+2 a b x+b^2 x^2} (a B+A b)}{5 (a+b x)}+\frac{a^2 x^4 \sqrt{a^2+2 a b x+b^2 x^2} (a B+3 A b)}{4 (a+b x)}+\frac{a^3 A x^3 \sqrt{a^2+2 a b x+b^2 x^2}}{3 (a+b x)}+\frac{b^3 B x^7 \sqrt{a^2+2 a b x+b^2 x^2}}{7 (a+b x)} \]

Antiderivative was successfully verified.

[In]

Int[x^2*(A + B*x)*(a^2 + 2*a*b*x + b^2*x^2)^(3/2),x]

[Out]

(a^3*A*x^3*Sqrt[a^2 + 2*a*b*x + b^2*x^2])/(3*(a + b*x)) + (a^2*(3*A*b + a*B)*x^4*Sqrt[a^2 + 2*a*b*x + b^2*x^2]
)/(4*(a + b*x)) + (3*a*b*(A*b + a*B)*x^5*Sqrt[a^2 + 2*a*b*x + b^2*x^2])/(5*(a + b*x)) + (b^2*(A*b + 3*a*B)*x^6
*Sqrt[a^2 + 2*a*b*x + b^2*x^2])/(6*(a + b*x)) + (b^3*B*x^7*Sqrt[a^2 + 2*a*b*x + b^2*x^2])/(7*(a + b*x))

Rule 770

Int[((d_.) + (e_.)*(x_))^(m_.)*((f_.) + (g_.)*(x_))*((a_.) + (b_.)*(x_) + (c_.)*(x_)^2)^(p_), x_Symbol] :> Dis
t[(a + b*x + c*x^2)^FracPart[p]/(c^IntPart[p]*(b/2 + c*x)^(2*FracPart[p])), Int[(d + e*x)^m*(f + g*x)*(b/2 + c
*x)^(2*p), x], x] /; FreeQ[{a, b, c, d, e, f, g, m}, x] && EqQ[b^2 - 4*a*c, 0]

Rule 76

Int[((d_.)*(x_))^(n_.)*((a_) + (b_.)*(x_))*((e_) + (f_.)*(x_))^(p_.), x_Symbol] :> Int[ExpandIntegrand[(a + b*
x)*(d*x)^n*(e + f*x)^p, x], x] /; FreeQ[{a, b, d, e, f, n}, x] && IGtQ[p, 0] && (NeQ[n, -1] || EqQ[p, 1]) && N
eQ[b*e + a*f, 0] && ( !IntegerQ[n] || LtQ[9*p + 5*n, 0] || GeQ[n + p + 1, 0] || (GeQ[n + p + 2, 0] && Rational
Q[a, b, d, e, f])) && (NeQ[n + p + 3, 0] || EqQ[p, 1])

Rubi steps

\begin{align*} \int x^2 (A+B x) \left (a^2+2 a b x+b^2 x^2\right )^{3/2} \, dx &=\frac{\sqrt{a^2+2 a b x+b^2 x^2} \int x^2 \left (a b+b^2 x\right )^3 (A+B x) \, dx}{b^2 \left (a b+b^2 x\right )}\\ &=\frac{\sqrt{a^2+2 a b x+b^2 x^2} \int \left (a^3 A b^3 x^2+a^2 b^3 (3 A b+a B) x^3+3 a b^4 (A b+a B) x^4+b^5 (A b+3 a B) x^5+b^6 B x^6\right ) \, dx}{b^2 \left (a b+b^2 x\right )}\\ &=\frac{a^3 A x^3 \sqrt{a^2+2 a b x+b^2 x^2}}{3 (a+b x)}+\frac{a^2 (3 A b+a B) x^4 \sqrt{a^2+2 a b x+b^2 x^2}}{4 (a+b x)}+\frac{3 a b (A b+a B) x^5 \sqrt{a^2+2 a b x+b^2 x^2}}{5 (a+b x)}+\frac{b^2 (A b+3 a B) x^6 \sqrt{a^2+2 a b x+b^2 x^2}}{6 (a+b x)}+\frac{b^3 B x^7 \sqrt{a^2+2 a b x+b^2 x^2}}{7 (a+b x)}\\ \end{align*}

Mathematica [A]  time = 0.0333847, size = 87, normalized size = 0.41 \[ \frac{x^3 \sqrt{(a+b x)^2} \left (63 a^2 b x (5 A+4 B x)+35 a^3 (4 A+3 B x)+42 a b^2 x^2 (6 A+5 B x)+10 b^3 x^3 (7 A+6 B x)\right )}{420 (a+b x)} \]

Antiderivative was successfully verified.

[In]

Integrate[x^2*(A + B*x)*(a^2 + 2*a*b*x + b^2*x^2)^(3/2),x]

[Out]

(x^3*Sqrt[(a + b*x)^2]*(35*a^3*(4*A + 3*B*x) + 63*a^2*b*x*(5*A + 4*B*x) + 42*a*b^2*x^2*(6*A + 5*B*x) + 10*b^3*
x^3*(7*A + 6*B*x)))/(420*(a + b*x))

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Maple [A]  time = 0.007, size = 92, normalized size = 0.4 \begin{align*}{\frac{{x}^{3} \left ( 60\,{b}^{3}B{x}^{4}+70\,A{b}^{3}{x}^{3}+210\,{x}^{3}Ba{b}^{2}+252\,{x}^{2}Aa{b}^{2}+252\,{x}^{2}B{a}^{2}b+315\,xA{a}^{2}b+105\,{a}^{3}Bx+140\,A{a}^{3} \right ) }{420\, \left ( bx+a \right ) ^{3}} \left ( \left ( bx+a \right ) ^{2} \right ) ^{{\frac{3}{2}}}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^2*(B*x+A)*(b^2*x^2+2*a*b*x+a^2)^(3/2),x)

[Out]

1/420*x^3*(60*B*b^3*x^4+70*A*b^3*x^3+210*B*a*b^2*x^3+252*A*a*b^2*x^2+252*B*a^2*b*x^2+315*A*a^2*b*x+105*B*a^3*x
+140*A*a^3)*((b*x+a)^2)^(3/2)/(b*x+a)^3

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Maxima [F(-2)]  time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*(B*x+A)*(b^2*x^2+2*a*b*x+a^2)^(3/2),x, algorithm="maxima")

[Out]

Exception raised: ValueError

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Fricas [A]  time = 1.52972, size = 163, normalized size = 0.78 \begin{align*} \frac{1}{7} \, B b^{3} x^{7} + \frac{1}{3} \, A a^{3} x^{3} + \frac{1}{6} \,{\left (3 \, B a b^{2} + A b^{3}\right )} x^{6} + \frac{3}{5} \,{\left (B a^{2} b + A a b^{2}\right )} x^{5} + \frac{1}{4} \,{\left (B a^{3} + 3 \, A a^{2} b\right )} x^{4} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*(B*x+A)*(b^2*x^2+2*a*b*x+a^2)^(3/2),x, algorithm="fricas")

[Out]

1/7*B*b^3*x^7 + 1/3*A*a^3*x^3 + 1/6*(3*B*a*b^2 + A*b^3)*x^6 + 3/5*(B*a^2*b + A*a*b^2)*x^5 + 1/4*(B*a^3 + 3*A*a
^2*b)*x^4

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Sympy [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int x^{2} \left (A + B x\right ) \left (\left (a + b x\right )^{2}\right )^{\frac{3}{2}}\, dx \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**2*(B*x+A)*(b**2*x**2+2*a*b*x+a**2)**(3/2),x)

[Out]

Integral(x**2*(A + B*x)*((a + b*x)**2)**(3/2), x)

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Giac [A]  time = 1.1548, size = 203, normalized size = 0.97 \begin{align*} \frac{1}{7} \, B b^{3} x^{7} \mathrm{sgn}\left (b x + a\right ) + \frac{1}{2} \, B a b^{2} x^{6} \mathrm{sgn}\left (b x + a\right ) + \frac{1}{6} \, A b^{3} x^{6} \mathrm{sgn}\left (b x + a\right ) + \frac{3}{5} \, B a^{2} b x^{5} \mathrm{sgn}\left (b x + a\right ) + \frac{3}{5} \, A a b^{2} x^{5} \mathrm{sgn}\left (b x + a\right ) + \frac{1}{4} \, B a^{3} x^{4} \mathrm{sgn}\left (b x + a\right ) + \frac{3}{4} \, A a^{2} b x^{4} \mathrm{sgn}\left (b x + a\right ) + \frac{1}{3} \, A a^{3} x^{3} \mathrm{sgn}\left (b x + a\right ) - \frac{{\left (3 \, B a^{7} - 7 \, A a^{6} b\right )} \mathrm{sgn}\left (b x + a\right )}{420 \, b^{4}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*(B*x+A)*(b^2*x^2+2*a*b*x+a^2)^(3/2),x, algorithm="giac")

[Out]

1/7*B*b^3*x^7*sgn(b*x + a) + 1/2*B*a*b^2*x^6*sgn(b*x + a) + 1/6*A*b^3*x^6*sgn(b*x + a) + 3/5*B*a^2*b*x^5*sgn(b
*x + a) + 3/5*A*a*b^2*x^5*sgn(b*x + a) + 1/4*B*a^3*x^4*sgn(b*x + a) + 3/4*A*a^2*b*x^4*sgn(b*x + a) + 1/3*A*a^3
*x^3*sgn(b*x + a) - 1/420*(3*B*a^7 - 7*A*a^6*b)*sgn(b*x + a)/b^4