\(\int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx\) [1828]

Optimal result

Integrand size = 27, antiderivative size = 124 \[ \int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx=-\frac {b x}{8 a \left (a x^2+\sqrt {b+a^2 x^4}\right )^{3/2}}+\frac {x \sqrt {a x^2+\sqrt {b+a^2 x^4}}}{4 a}-\frac {\sqrt {b} \arctan \left (\frac {\sqrt {2} \sqrt {a} x \sqrt {a x^2+\sqrt {b+a^2 x^4}}}{\sqrt {b}}\right )}{8 \sqrt {2} a^{3/2}} \]

[Out]

-1/8*b*x/a/(a*x^2+(a^2*x^4+b)^(1/2))^(3/2)+1/4*x*(a*x^2+(a^2*x^4+b)^(1/2))^(1/2)/a-1/16*b^(1/2)*arctan(2^(1/2)
*a^(1/2)*x*(a*x^2+(a^2*x^4+b)^(1/2))^(1/2)/b^(1/2))*2^(1/2)/a^(3/2)

Rubi [F]

\[ \int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx=\int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx \]

[In]

Int[x^2/Sqrt[a*x^2 + Sqrt[b + a^2*x^4]],x]

[Out]

Defer[Int][x^2/Sqrt[a*x^2 + Sqrt[b + a^2*x^4]], x]

Rubi steps \begin{align*} \text {integral}& = \int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx \\ \end{align*}

Mathematica [A] (verified)

Time = 0.26 (sec) , antiderivative size = 119, normalized size of antiderivative = 0.96 \[ \int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx=\frac {x \left (b+4 a x^2 \left (a x^2+\sqrt {b+a^2 x^4}\right )\right )}{8 a \left (a x^2+\sqrt {b+a^2 x^4}\right )^{3/2}}-\frac {\sqrt {b} \arctan \left (\frac {\sqrt {2} \sqrt {a} x \sqrt {a x^2+\sqrt {b+a^2 x^4}}}{\sqrt {b}}\right )}{8 \sqrt {2} a^{3/2}} \]

[In]

Integrate[x^2/Sqrt[a*x^2 + Sqrt[b + a^2*x^4]],x]

[Out]

(x*(b + 4*a*x^2*(a*x^2 + Sqrt[b + a^2*x^4])))/(8*a*(a*x^2 + Sqrt[b + a^2*x^4])^(3/2)) - (Sqrt[b]*ArcTan[(Sqrt[
2]*Sqrt[a]*x*Sqrt[a*x^2 + Sqrt[b + a^2*x^4]])/Sqrt[b]])/(8*Sqrt[2]*a^(3/2))

Maple [F]

\[\int \frac {x^{2}}{\sqrt {a \,x^{2}+\sqrt {a^{2} x^{4}+b}}}d x\]

[In]

int(x^2/(a*x^2+(a^2*x^4+b)^(1/2))^(1/2),x)

[Out]

int(x^2/(a*x^2+(a^2*x^4+b)^(1/2))^(1/2),x)

Fricas [A] (verification not implemented)

none

Time = 1.88 (sec) , antiderivative size = 323, normalized size of antiderivative = 2.60 \[ \int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx=\left [\frac {\sqrt {\frac {1}{2}} b \sqrt {-\frac {b}{a}} \log \left (4 \, a^{2} b x^{4} - 4 \, \sqrt {a^{2} x^{4} + b} a b x^{2} + b^{2} - 4 \, {\left (2 \, \sqrt {\frac {1}{2}} \sqrt {a^{2} x^{4} + b} a^{2} x^{3} \sqrt {-\frac {b}{a}} - \sqrt {\frac {1}{2}} {\left (2 \, a^{3} x^{5} + a b x\right )} \sqrt {-\frac {b}{a}}\right )} \sqrt {a x^{2} + \sqrt {a^{2} x^{4} + b}}\right ) - 2 \, {\left (2 \, a^{2} x^{5} - 2 \, \sqrt {a^{2} x^{4} + b} a x^{3} - b x\right )} \sqrt {a x^{2} + \sqrt {a^{2} x^{4} + b}}}{16 \, a b}, \frac {\sqrt {\frac {1}{2}} b \sqrt {\frac {b}{a}} \arctan \left (-\frac {{\left (\sqrt {\frac {1}{2}} a x^{2} \sqrt {\frac {b}{a}} - \sqrt {\frac {1}{2}} \sqrt {a^{2} x^{4} + b} \sqrt {\frac {b}{a}}\right )} \sqrt {a x^{2} + \sqrt {a^{2} x^{4} + b}}}{b x}\right ) - {\left (2 \, a^{2} x^{5} - 2 \, \sqrt {a^{2} x^{4} + b} a x^{3} - b x\right )} \sqrt {a x^{2} + \sqrt {a^{2} x^{4} + b}}}{8 \, a b}\right ] \]

[In]

integrate(x^2/(a*x^2+(a^2*x^4+b)^(1/2))^(1/2),x, algorithm="fricas")

[Out]

[1/16*(sqrt(1/2)*b*sqrt(-b/a)*log(4*a^2*b*x^4 - 4*sqrt(a^2*x^4 + b)*a*b*x^2 + b^2 - 4*(2*sqrt(1/2)*sqrt(a^2*x^
4 + b)*a^2*x^3*sqrt(-b/a) - sqrt(1/2)*(2*a^3*x^5 + a*b*x)*sqrt(-b/a))*sqrt(a*x^2 + sqrt(a^2*x^4 + b))) - 2*(2*
a^2*x^5 - 2*sqrt(a^2*x^4 + b)*a*x^3 - b*x)*sqrt(a*x^2 + sqrt(a^2*x^4 + b)))/(a*b), 1/8*(sqrt(1/2)*b*sqrt(b/a)*
arctan(-(sqrt(1/2)*a*x^2*sqrt(b/a) - sqrt(1/2)*sqrt(a^2*x^4 + b)*sqrt(b/a))*sqrt(a*x^2 + sqrt(a^2*x^4 + b))/(b
*x)) - (2*a^2*x^5 - 2*sqrt(a^2*x^4 + b)*a*x^3 - b*x)*sqrt(a*x^2 + sqrt(a^2*x^4 + b)))/(a*b)]

Sympy [F]

\[ \int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx=\int \frac {x^{2}}{\sqrt {a x^{2} + \sqrt {a^{2} x^{4} + b}}}\, dx \]

[In]

integrate(x**2/(a*x**2+(a**2*x**4+b)**(1/2))**(1/2),x)

[Out]

Integral(x**2/sqrt(a*x**2 + sqrt(a**2*x**4 + b)), x)

Maxima [F]

\[ \int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx=\int { \frac {x^{2}}{\sqrt {a x^{2} + \sqrt {a^{2} x^{4} + b}}} \,d x } \]

[In]

integrate(x^2/(a*x^2+(a^2*x^4+b)^(1/2))^(1/2),x, algorithm="maxima")

[Out]

integrate(x^2/sqrt(a*x^2 + sqrt(a^2*x^4 + b)), x)

Giac [F]

\[ \int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx=\int { \frac {x^{2}}{\sqrt {a x^{2} + \sqrt {a^{2} x^{4} + b}}} \,d x } \]

[In]

integrate(x^2/(a*x^2+(a^2*x^4+b)^(1/2))^(1/2),x, algorithm="giac")

[Out]

integrate(x^2/sqrt(a*x^2 + sqrt(a^2*x^4 + b)), x)

Mupad [F(-1)]

Timed out. \[ \int \frac {x^2}{\sqrt {a x^2+\sqrt {b+a^2 x^4}}} \, dx=\int \frac {x^2}{\sqrt {\sqrt {a^2\,x^4+b}+a\,x^2}} \,d x \]

[In]

int(x^2/((b + a^2*x^4)^(1/2) + a*x^2)^(1/2),x)

[Out]

int(x^2/((b + a^2*x^4)^(1/2) + a*x^2)^(1/2), x)