3.757 \(\int x^2 \sqrt{c x^2} (a+b x) \, dx\)

Optimal. Leaf size=35 \[ \frac{1}{4} a x^3 \sqrt{c x^2}+\frac{1}{5} b x^4 \sqrt{c x^2} \]

[Out]

(a*x^3*Sqrt[c*x^2])/4 + (b*x^4*Sqrt[c*x^2])/5

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Rubi [A]  time = 0.0099123, antiderivative size = 35, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 2, integrand size = 18, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.111, Rules used = {15, 43} \[ \frac{1}{4} a x^3 \sqrt{c x^2}+\frac{1}{5} b x^4 \sqrt{c x^2} \]

Antiderivative was successfully verified.

[In]

Int[x^2*Sqrt[c*x^2]*(a + b*x),x]

[Out]

(a*x^3*Sqrt[c*x^2])/4 + (b*x^4*Sqrt[c*x^2])/5

Rule 15

Int[(u_.)*((a_.)*(x_)^(n_))^(m_), x_Symbol] :> Dist[(a^IntPart[m]*(a*x^n)^FracPart[m])/x^(n*FracPart[m]), Int[
u*x^(m*n), x], x] /; FreeQ[{a, m, n}, x] &&  !IntegerQ[m]

Rule 43

Int[((a_.) + (b_.)*(x_))^(m_.)*((c_.) + (d_.)*(x_))^(n_.), x_Symbol] :> Int[ExpandIntegrand[(a + b*x)^m*(c + d
*x)^n, x], x] /; FreeQ[{a, b, c, d, n}, x] && NeQ[b*c - a*d, 0] && IGtQ[m, 0] && ( !IntegerQ[n] || (EqQ[c, 0]
&& LeQ[7*m + 4*n + 4, 0]) || LtQ[9*m + 5*(n + 1), 0] || GtQ[m + n + 2, 0])

Rubi steps

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

Mathematica [A]  time = 0.003507, size = 24, normalized size = 0.69 \[ \frac{1}{20} x^3 \sqrt{c x^2} (5 a+4 b x) \]

Antiderivative was successfully verified.

[In]

Integrate[x^2*Sqrt[c*x^2]*(a + b*x),x]

[Out]

(x^3*Sqrt[c*x^2]*(5*a + 4*b*x))/20

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Maple [A]  time = 0.003, size = 21, normalized size = 0.6 \begin{align*}{\frac{{x}^{3} \left ( 4\,bx+5\,a \right ) }{20}\sqrt{c{x}^{2}}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^2*(b*x+a)*(c*x^2)^(1/2),x)

[Out]

1/20*x^3*(4*b*x+5*a)*(c*x^2)^(1/2)

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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)*(c*x^2)^(1/2),x, algorithm="maxima")

[Out]

Exception raised: ValueError

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Fricas [A]  time = 1.56547, size = 51, normalized size = 1.46 \begin{align*} \frac{1}{20} \,{\left (4 \, b x^{4} + 5 \, a x^{3}\right )} \sqrt{c x^{2}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*(b*x+a)*(c*x^2)^(1/2),x, algorithm="fricas")

[Out]

1/20*(4*b*x^4 + 5*a*x^3)*sqrt(c*x^2)

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Sympy [A]  time = 0.305324, size = 36, normalized size = 1.03 \begin{align*} \frac{a \sqrt{c} x^{3} \sqrt{x^{2}}}{4} + \frac{b \sqrt{c} x^{4} \sqrt{x^{2}}}{5} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**2*(b*x+a)*(c*x**2)**(1/2),x)

[Out]

a*sqrt(c)*x**3*sqrt(x**2)/4 + b*sqrt(c)*x**4*sqrt(x**2)/5

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Giac [A]  time = 1.06644, size = 30, normalized size = 0.86 \begin{align*} \frac{1}{20} \,{\left (4 \, b x^{5} \mathrm{sgn}\left (x\right ) + 5 \, a x^{4} \mathrm{sgn}\left (x\right )\right )} \sqrt{c} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*(b*x+a)*(c*x^2)^(1/2),x, algorithm="giac")

[Out]

1/20*(4*b*x^5*sgn(x) + 5*a*x^4*sgn(x))*sqrt(c)