Integrand size = 35, antiderivative size = 130 \[ \int \frac {\left (b+a x^2\right ) \sqrt {b x+a x^3}}{x^2 \left (-b+a x^2\right )} \, dx=\frac {2 \sqrt {b x+a x^3}}{x}+\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \arctan \left (\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {b x+a x^3}}{b+a x^2}\right )-\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \text {arctanh}\left (\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {b x+a x^3}}{b+a x^2}\right ) \]
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Time = 0.36 (sec) , antiderivative size = 176, normalized size of antiderivative = 1.35, number of steps used = 13, number of rules used = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.286, Rules used = {2081, 477, 485, 12, 504, 1225, 226, 1713, 211, 214} \[ \int \frac {\left (b+a x^2\right ) \sqrt {b x+a x^3}}{x^2 \left (-b+a x^2\right )} \, dx=\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {a x^3+b x} \arctan \left (\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {x}}{\sqrt {a x^2+b}}\right )}{\sqrt {x} \sqrt {a x^2+b}}-\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {a x^3+b x} \text {arctanh}\left (\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {x}}{\sqrt {a x^2+b}}\right )}{\sqrt {x} \sqrt {a x^2+b}}+\frac {2 \sqrt {a x^3+b x}}{x} \]
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Rule 12
Rule 211
Rule 214
Rule 226
Rule 477
Rule 485
Rule 504
Rule 1225
Rule 1713
Rule 2081
Rubi steps \begin{align*} \text {integral}& = \frac {\sqrt {b x+a x^3} \int \frac {\left (b+a x^2\right )^{3/2}}{x^{3/2} \left (-b+a x^2\right )} \, dx}{\sqrt {x} \sqrt {b+a x^2}} \\ & = \frac {\left (2 \sqrt {b x+a x^3}\right ) \text {Subst}\left (\int \frac {\left (b+a x^4\right )^{3/2}}{x^2 \left (-b+a x^4\right )} \, dx,x,\sqrt {x}\right )}{\sqrt {x} \sqrt {b+a x^2}} \\ & = \frac {2 \sqrt {b x+a x^3}}{x}-\frac {\left (2 \sqrt {b x+a x^3}\right ) \text {Subst}\left (\int -\frac {4 a b^2 x^2}{\left (-b+a x^4\right ) \sqrt {b+a x^4}} \, dx,x,\sqrt {x}\right )}{b \sqrt {x} \sqrt {b+a x^2}} \\ & = \frac {2 \sqrt {b x+a x^3}}{x}+\frac {\left (8 a b \sqrt {b x+a x^3}\right ) \text {Subst}\left (\int \frac {x^2}{\left (-b+a x^4\right ) \sqrt {b+a x^4}} \, dx,x,\sqrt {x}\right )}{\sqrt {x} \sqrt {b+a x^2}} \\ & = \frac {2 \sqrt {b x+a x^3}}{x}-\frac {\left (4 \sqrt {a} b \sqrt {b x+a x^3}\right ) \text {Subst}\left (\int \frac {1}{\left (\sqrt {b}-\sqrt {a} x^2\right ) \sqrt {b+a x^4}} \, dx,x,\sqrt {x}\right )}{\sqrt {x} \sqrt {b+a x^2}}+\frac {\left (4 \sqrt {a} b \sqrt {b x+a x^3}\right ) \text {Subst}\left (\int \frac {1}{\left (\sqrt {b}+\sqrt {a} x^2\right ) \sqrt {b+a x^4}} \, dx,x,\sqrt {x}\right )}{\sqrt {x} \sqrt {b+a x^2}} \\ & = \frac {2 \sqrt {b x+a x^3}}{x}+\frac {\left (2 \sqrt {a} \sqrt {b} \sqrt {b x+a x^3}\right ) \text {Subst}\left (\int \frac {\sqrt {b}-\sqrt {a} x^2}{\left (\sqrt {b}+\sqrt {a} x^2\right ) \sqrt {b+a x^4}} \, dx,x,\sqrt {x}\right )}{\sqrt {x} \sqrt {b+a x^2}}-\frac {\left (2 \sqrt {a} \sqrt {b} \sqrt {b x+a x^3}\right ) \text {Subst}\left (\int \frac {\sqrt {b}+\sqrt {a} x^2}{\left (\sqrt {b}-\sqrt {a} x^2\right ) \sqrt {b+a x^4}} \, dx,x,\sqrt {x}\right )}{\sqrt {x} \sqrt {b+a x^2}} \\ & = \frac {2 \sqrt {b x+a x^3}}{x}-\frac {\left (2 \sqrt {a} b \sqrt {b x+a x^3}\right ) \text {Subst}\left (\int \frac {1}{\sqrt {b}-2 \sqrt {a} b x^2} \, dx,x,\frac {\sqrt {x}}{\sqrt {b+a x^2}}\right )}{\sqrt {x} \sqrt {b+a x^2}}+\frac {\left (2 \sqrt {a} b \sqrt {b x+a x^3}\right ) \text {Subst}\left (\int \frac {1}{\sqrt {b}+2 \sqrt {a} b x^2} \, dx,x,\frac {\sqrt {x}}{\sqrt {b+a x^2}}\right )}{\sqrt {x} \sqrt {b+a x^2}} \\ & = \frac {2 \sqrt {b x+a x^3}}{x}+\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {b x+a x^3} \arctan \left (\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {x}}{\sqrt {b+a x^2}}\right )}{\sqrt {x} \sqrt {b+a x^2}}-\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {b x+a x^3} \text {arctanh}\left (\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {x}}{\sqrt {b+a x^2}}\right )}{\sqrt {x} \sqrt {b+a x^2}} \\ \end{align*}
Time = 0.44 (sec) , antiderivative size = 148, normalized size of antiderivative = 1.14 \[ \int \frac {\left (b+a x^2\right ) \sqrt {b x+a x^3}}{x^2 \left (-b+a x^2\right )} \, dx=\frac {\sqrt {b+a x^2} \left (2 \sqrt {b+a x^2}+\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {x} \arctan \left (\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {x}}{\sqrt {b+a x^2}}\right )-\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {x} \text {arctanh}\left (\frac {\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} \sqrt {x}}{\sqrt {b+a x^2}}\right )\right )}{\sqrt {x \left (b+a x^2\right )}} \]
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Time = 0.86 (sec) , antiderivative size = 109, normalized size of antiderivative = 0.84
method | result | size |
risch | \(\frac {2 a \,x^{2}+2 b}{\sqrt {\left (a \,x^{2}+b \right ) x}}-\frac {\sqrt {2}\, \left (a b \right )^{\frac {1}{4}} \left (\ln \left (\frac {\sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x +\sqrt {\left (a \,x^{2}+b \right ) x}}{-\sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x +\sqrt {\left (a \,x^{2}+b \right ) x}}\right )+2 \arctan \left (\frac {\sqrt {\left (a \,x^{2}+b \right ) x}\, \sqrt {2}}{2 x \left (a b \right )^{\frac {1}{4}}}\right )\right )}{2}\) | \(109\) |
default | \(\frac {-\ln \left (\frac {-\sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x -\sqrt {\left (a \,x^{2}+b \right ) x}}{\sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x -\sqrt {\left (a \,x^{2}+b \right ) x}}\right ) \sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x -2 \arctan \left (\frac {\sqrt {\left (a \,x^{2}+b \right ) x}\, \sqrt {2}}{2 x \left (a b \right )^{\frac {1}{4}}}\right ) \sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x +4 \sqrt {\left (a \,x^{2}+b \right ) x}}{2 x}\) | \(120\) |
pseudoelliptic | \(\frac {-\ln \left (\frac {-\sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x -\sqrt {\left (a \,x^{2}+b \right ) x}}{\sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x -\sqrt {\left (a \,x^{2}+b \right ) x}}\right ) \sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x -2 \arctan \left (\frac {\sqrt {\left (a \,x^{2}+b \right ) x}\, \sqrt {2}}{2 x \left (a b \right )^{\frac {1}{4}}}\right ) \sqrt {2}\, \left (a b \right )^{\frac {1}{4}} x +4 \sqrt {\left (a \,x^{2}+b \right ) x}}{2 x}\) | \(120\) |
elliptic | \(\frac {2 a \,x^{2}+2 b}{\sqrt {\left (a \,x^{2}+b \right ) x}}+\frac {2 b \sqrt {-a b}\, \sqrt {\frac {x a}{\sqrt {-a b}}+1}\, \sqrt {-\frac {2 x a}{\sqrt {-a b}}+2}\, \sqrt {-\frac {x a}{\sqrt {-a b}}}\, \operatorname {EllipticPi}\left (\sqrt {\frac {\left (x +\frac {\sqrt {-a b}}{a}\right ) a}{\sqrt {-a b}}}, -\frac {\sqrt {-a b}}{a \left (-\frac {\sqrt {-a b}}{a}-\frac {\sqrt {a b}}{a}\right )}, \frac {\sqrt {2}}{2}\right )}{a \sqrt {a \,x^{3}+b x}\, \left (-\frac {\sqrt {-a b}}{a}-\frac {\sqrt {a b}}{a}\right )}+\frac {2 b \sqrt {-a b}\, \sqrt {\frac {x a}{\sqrt {-a b}}+1}\, \sqrt {-\frac {2 x a}{\sqrt {-a b}}+2}\, \sqrt {-\frac {x a}{\sqrt {-a b}}}\, \operatorname {EllipticPi}\left (\sqrt {\frac {\left (x +\frac {\sqrt {-a b}}{a}\right ) a}{\sqrt {-a b}}}, -\frac {\sqrt {-a b}}{a \left (-\frac {\sqrt {-a b}}{a}+\frac {\sqrt {a b}}{a}\right )}, \frac {\sqrt {2}}{2}\right )}{a \sqrt {a \,x^{3}+b x}\, \left (-\frac {\sqrt {-a b}}{a}+\frac {\sqrt {a b}}{a}\right )}\) | \(318\) |
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Result contains complex when optimal does not.
Time = 40.91 (sec) , antiderivative size = 1301, normalized size of antiderivative = 10.01 \[ \int \frac {\left (b+a x^2\right ) \sqrt {b x+a x^3}}{x^2 \left (-b+a x^2\right )} \, dx=\text {Too large to display} \]
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\[ \int \frac {\left (b+a x^2\right ) \sqrt {b x+a x^3}}{x^2 \left (-b+a x^2\right )} \, dx=\int \frac {\sqrt {x \left (a x^{2} + b\right )} \left (a x^{2} + b\right )}{x^{2} \left (a x^{2} - b\right )}\, dx \]
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\[ \int \frac {\left (b+a x^2\right ) \sqrt {b x+a x^3}}{x^2 \left (-b+a x^2\right )} \, dx=\int { \frac {\sqrt {a x^{3} + b x} {\left (a x^{2} + b\right )}}{{\left (a x^{2} - b\right )} x^{2}} \,d x } \]
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\[ \int \frac {\left (b+a x^2\right ) \sqrt {b x+a x^3}}{x^2 \left (-b+a x^2\right )} \, dx=\int { \frac {\sqrt {a x^{3} + b x} {\left (a x^{2} + b\right )}}{{\left (a x^{2} - b\right )} x^{2}} \,d x } \]
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Timed out. \[ \int \frac {\left (b+a x^2\right ) \sqrt {b x+a x^3}}{x^2 \left (-b+a x^2\right )} \, dx=\text {Hanged} \]
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