Integrand size = 24, antiderivative size = 94 \[ \int \frac {x^2}{\left (a x^2+b x^3+c x^4\right )^{3/2}} \, dx=\frac {2 x \left (b^2-2 a c+b c x\right )}{a \left (b^2-4 a c\right ) \sqrt {a x^2+b x^3+c x^4}}-\frac {\text {arctanh}\left (\frac {x (2 a+b x)}{2 \sqrt {a} \sqrt {a x^2+b x^3+c x^4}}\right )}{a^{3/2}} \]
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Time = 0.04 (sec) , antiderivative size = 94, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {1936, 1918, 212} \[ \int \frac {x^2}{\left (a x^2+b x^3+c x^4\right )^{3/2}} \, dx=\frac {2 x \left (-2 a c+b^2+b c x\right )}{a \left (b^2-4 a c\right ) \sqrt {a x^2+b x^3+c x^4}}-\frac {\text {arctanh}\left (\frac {x (2 a+b x)}{2 \sqrt {a} \sqrt {a x^2+b x^3+c x^4}}\right )}{a^{3/2}} \]
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Rule 212
Rule 1918
Rule 1936
Rubi steps \begin{align*} \text {integral}& = \frac {2 x \left (b^2-2 a c+b c x\right )}{a \left (b^2-4 a c\right ) \sqrt {a x^2+b x^3+c x^4}}+\frac {\int \frac {1}{\sqrt {a x^2+b x^3+c x^4}} \, dx}{a} \\ & = \frac {2 x \left (b^2-2 a c+b c x\right )}{a \left (b^2-4 a c\right ) \sqrt {a x^2+b x^3+c x^4}}-\frac {2 \text {Subst}\left (\int \frac {1}{4 a-x^2} \, dx,x,\frac {x (2 a+b x)}{\sqrt {a x^2+b x^3+c x^4}}\right )}{a} \\ & = \frac {2 x \left (b^2-2 a c+b c x\right )}{a \left (b^2-4 a c\right ) \sqrt {a x^2+b x^3+c x^4}}-\frac {\tanh ^{-1}\left (\frac {x (2 a+b x)}{2 \sqrt {a} \sqrt {a x^2+b x^3+c x^4}}\right )}{a^{3/2}} \\ \end{align*}
Time = 0.39 (sec) , antiderivative size = 108, normalized size of antiderivative = 1.15 \[ \int \frac {x^2}{\left (a x^2+b x^3+c x^4\right )^{3/2}} \, dx=-\frac {2 x \left (\sqrt {a} \left (b^2-2 a c+b c x\right )+\left (b^2-4 a c\right ) \sqrt {a+x (b+c x)} \text {arctanh}\left (\frac {\sqrt {c} x-\sqrt {a+x (b+c x)}}{\sqrt {a}}\right )\right )}{a^{3/2} \left (-b^2+4 a c\right ) \sqrt {x^2 (a+x (b+c x))}} \]
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Time = 0.15 (sec) , antiderivative size = 107, normalized size of antiderivative = 1.14
method | result | size |
pseudoelliptic | \(-\frac {4 \left (-a^{\frac {3}{2}} c +\frac {b \sqrt {a}\, \left (c x +b \right )}{2}+\left (-\ln \left (2\right )+\ln \left (\frac {2 a +b x +2 \sqrt {a}\, \sqrt {c \,x^{2}+b x +a}}{x \sqrt {a}}\right )\right ) \sqrt {c \,x^{2}+b x +a}\, \left (a c -\frac {b^{2}}{4}\right )\right )}{\sqrt {c \,x^{2}+b x +a}\, a^{\frac {3}{2}} \left (4 a c -b^{2}\right )}\) | \(107\) |
default | \(\frac {x^{3} \left (c \,x^{2}+b x +a \right ) \left (-2 a^{\frac {3}{2}} b c x +4 a^{\frac {5}{2}} c -2 a^{\frac {3}{2}} b^{2}-4 \ln \left (\frac {2 a +b x +2 \sqrt {a}\, \sqrt {c \,x^{2}+b x +a}}{x}\right ) \sqrt {c \,x^{2}+b x +a}\, a^{2} c +\ln \left (\frac {2 a +b x +2 \sqrt {a}\, \sqrt {c \,x^{2}+b x +a}}{x}\right ) \sqrt {c \,x^{2}+b x +a}\, a \,b^{2}\right )}{\left (c \,x^{4}+b \,x^{3}+a \,x^{2}\right )^{\frac {3}{2}} a^{\frac {5}{2}} \left (4 a c -b^{2}\right )}\) | \(164\) |
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Leaf count of result is larger than twice the leaf count of optimal. 201 vs. \(2 (84) = 168\).
Time = 0.31 (sec) , antiderivative size = 411, normalized size of antiderivative = 4.37 \[ \int \frac {x^2}{\left (a x^2+b x^3+c x^4\right )^{3/2}} \, dx=\left [\frac {{\left ({\left (b^{2} c - 4 \, a c^{2}\right )} x^{3} + {\left (b^{3} - 4 \, a b c\right )} x^{2} + {\left (a b^{2} - 4 \, a^{2} c\right )} x\right )} \sqrt {a} \log \left (-\frac {8 \, a b x^{2} + {\left (b^{2} + 4 \, a c\right )} x^{3} + 8 \, a^{2} x - 4 \, \sqrt {c x^{4} + b x^{3} + a x^{2}} {\left (b x + 2 \, a\right )} \sqrt {a}}{x^{3}}\right ) + 4 \, \sqrt {c x^{4} + b x^{3} + a x^{2}} {\left (a b c x + a b^{2} - 2 \, a^{2} c\right )}}{2 \, {\left ({\left (a^{2} b^{2} c - 4 \, a^{3} c^{2}\right )} x^{3} + {\left (a^{2} b^{3} - 4 \, a^{3} b c\right )} x^{2} + {\left (a^{3} b^{2} - 4 \, a^{4} c\right )} x\right )}}, \frac {{\left ({\left (b^{2} c - 4 \, a c^{2}\right )} x^{3} + {\left (b^{3} - 4 \, a b c\right )} x^{2} + {\left (a b^{2} - 4 \, a^{2} c\right )} x\right )} \sqrt {-a} \arctan \left (\frac {\sqrt {c x^{4} + b x^{3} + a x^{2}} {\left (b x + 2 \, a\right )} \sqrt {-a}}{2 \, {\left (a c x^{3} + a b x^{2} + a^{2} x\right )}}\right ) + 2 \, \sqrt {c x^{4} + b x^{3} + a x^{2}} {\left (a b c x + a b^{2} - 2 \, a^{2} c\right )}}{{\left (a^{2} b^{2} c - 4 \, a^{3} c^{2}\right )} x^{3} + {\left (a^{2} b^{3} - 4 \, a^{3} b c\right )} x^{2} + {\left (a^{3} b^{2} - 4 \, a^{4} c\right )} x}\right ] \]
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\[ \int \frac {x^2}{\left (a x^2+b x^3+c x^4\right )^{3/2}} \, dx=\int \frac {x^{2}}{\left (x^{2} \left (a + b x + c x^{2}\right )\right )^{\frac {3}{2}}}\, dx \]
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\[ \int \frac {x^2}{\left (a x^2+b x^3+c x^4\right )^{3/2}} \, dx=\int { \frac {x^{2}}{{\left (c x^{4} + b x^{3} + a x^{2}\right )}^{\frac {3}{2}}} \,d x } \]
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Leaf count of result is larger than twice the leaf count of optimal. 199 vs. \(2 (84) = 168\).
Time = 0.34 (sec) , antiderivative size = 199, normalized size of antiderivative = 2.12 \[ \int \frac {x^2}{\left (a x^2+b x^3+c x^4\right )^{3/2}} \, dx=-\frac {2 \, {\left (a b^{2} \arctan \left (\frac {\sqrt {a}}{\sqrt {-a}}\right ) - 4 \, a^{2} c \arctan \left (\frac {\sqrt {a}}{\sqrt {-a}}\right ) + \sqrt {-a} \sqrt {a} b^{2} - 2 \, \sqrt {-a} a^{\frac {3}{2}} c\right )} \mathrm {sgn}\left (x\right )}{\sqrt {-a} a^{2} b^{2} - 4 \, \sqrt {-a} a^{3} c} + \frac {2 \, {\left (\frac {a b c x \mathrm {sgn}\left (x\right )}{a^{2} b^{2} - 4 \, a^{3} c} + \frac {a b^{2} \mathrm {sgn}\left (x\right ) - 2 \, a^{2} c \mathrm {sgn}\left (x\right )}{a^{2} b^{2} - 4 \, a^{3} c}\right )}}{\sqrt {c x^{2} + b x + a}} + \frac {2 \, \arctan \left (-\frac {\sqrt {c} x - \sqrt {c x^{2} + b x + a}}{\sqrt {-a}}\right )}{\sqrt {-a} a \mathrm {sgn}\left (x\right )} \]
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Timed out. \[ \int \frac {x^2}{\left (a x^2+b x^3+c x^4\right )^{3/2}} \, dx=\int \frac {x^2}{{\left (c\,x^4+b\,x^3+a\,x^2\right )}^{3/2}} \,d x \]
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