3.1.2 \(\int x (a+b x^3) (A+B x^3) \, dx\)

Optimal. Leaf size=33 \[ \frac {1}{5} x^5 (a B+A b)+\frac {1}{2} a A x^2+\frac {1}{8} b B x^8 \]

________________________________________________________________________________________

Rubi [A]  time = 0.02, antiderivative size = 33, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.062, Rules used = {448} \begin {gather*} \frac {1}{5} x^5 (a B+A b)+\frac {1}{2} a A x^2+\frac {1}{8} b B x^8 \end {gather*}

Antiderivative was successfully verified.

[In]

Int[x*(a + b*x^3)*(A + B*x^3),x]

[Out]

(a*A*x^2)/2 + ((A*b + a*B)*x^5)/5 + (b*B*x^8)/8

Rule 448

Int[((e_.)*(x_))^(m_.)*((a_) + (b_.)*(x_)^(n_))^(p_.)*((c_) + (d_.)*(x_)^(n_))^(q_.), x_Symbol] :> Int[ExpandI
ntegrand[(e*x)^m*(a + b*x^n)^p*(c + d*x^n)^q, x], x] /; FreeQ[{a, b, c, d, e, m, n}, x] && NeQ[b*c - a*d, 0] &
& IGtQ[p, 0] && IGtQ[q, 0]

Rubi steps

\begin {align*} \int x \left (a+b x^3\right ) \left (A+B x^3\right ) \, dx &=\int \left (a A x+(A b+a B) x^4+b B x^7\right ) \, dx\\ &=\frac {1}{2} a A x^2+\frac {1}{5} (A b+a B) x^5+\frac {1}{8} b B x^8\\ \end {align*}

________________________________________________________________________________________

Mathematica [A]  time = 0.01, size = 33, normalized size = 1.00 \begin {gather*} \frac {1}{5} x^5 (a B+A b)+\frac {1}{2} a A x^2+\frac {1}{8} b B x^8 \end {gather*}

Antiderivative was successfully verified.

[In]

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

[Out]

(a*A*x^2)/2 + ((A*b + a*B)*x^5)/5 + (b*B*x^8)/8

________________________________________________________________________________________

IntegrateAlgebraic [F]  time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int x \left (a+b x^3\right ) \left (A+B x^3\right ) \, dx \end {gather*}

Verification is not applicable to the result.

[In]

IntegrateAlgebraic[x*(a + b*x^3)*(A + B*x^3),x]

[Out]

IntegrateAlgebraic[x*(a + b*x^3)*(A + B*x^3), x]

________________________________________________________________________________________

fricas [A]  time = 0.70, size = 29, normalized size = 0.88 \begin {gather*} \frac {1}{8} x^{8} b B + \frac {1}{5} x^{5} a B + \frac {1}{5} x^{5} b A + \frac {1}{2} x^{2} a A \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/8*x^8*b*B + 1/5*x^5*a*B + 1/5*x^5*b*A + 1/2*x^2*a*A

________________________________________________________________________________________

giac [A]  time = 0.15, size = 29, normalized size = 0.88 \begin {gather*} \frac {1}{8} \, B b x^{8} + \frac {1}{5} \, B a x^{5} + \frac {1}{5} \, A b x^{5} + \frac {1}{2} \, A a x^{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/8*B*b*x^8 + 1/5*B*a*x^5 + 1/5*A*b*x^5 + 1/2*A*a*x^2

________________________________________________________________________________________

maple [A]  time = 0.04, size = 28, normalized size = 0.85 \begin {gather*} \frac {B b \,x^{8}}{8}+\frac {\left (A b +B a \right ) x^{5}}{5}+\frac {A a \,x^{2}}{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/2*A*a*x^2+1/5*(A*b+B*a)*x^5+1/8*b*B*x^8

________________________________________________________________________________________

maxima [A]  time = 0.63, size = 27, normalized size = 0.82 \begin {gather*} \frac {1}{8} \, B b x^{8} + \frac {1}{5} \, {\left (B a + A b\right )} x^{5} + \frac {1}{2} \, A a x^{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/8*B*b*x^8 + 1/5*(B*a + A*b)*x^5 + 1/2*A*a*x^2

________________________________________________________________________________________

mupad [B]  time = 2.48, size = 28, normalized size = 0.85 \begin {gather*} \frac {B\,b\,x^8}{8}+\left (\frac {A\,b}{5}+\frac {B\,a}{5}\right )\,x^5+\frac {A\,a\,x^2}{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x*(A + B*x^3)*(a + b*x^3),x)

[Out]

x^5*((A*b)/5 + (B*a)/5) + (A*a*x^2)/2 + (B*b*x^8)/8

________________________________________________________________________________________

sympy [A]  time = 0.07, size = 29, normalized size = 0.88 \begin {gather*} \frac {A a x^{2}}{2} + \frac {B b x^{8}}{8} + x^{5} \left (\frac {A b}{5} + \frac {B a}{5}\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

A*a*x**2/2 + B*b*x**8/8 + x**5*(A*b/5 + B*a/5)

________________________________________________________________________________________