Integrand size = 17, antiderivative size = 76 \[ \int \frac {x^2}{\sqrt {b x+c x^2}} \, dx=-\frac {3 b \sqrt {b x+c x^2}}{4 c^2}+\frac {x \sqrt {b x+c x^2}}{2 c}+\frac {3 b^2 \text {arctanh}\left (\frac {\sqrt {c} x}{\sqrt {b x+c x^2}}\right )}{4 c^{5/2}} \]
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Time = 0.02 (sec) , antiderivative size = 76, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.235, Rules used = {684, 654, 634, 212} \[ \int \frac {x^2}{\sqrt {b x+c x^2}} \, dx=\frac {3 b^2 \text {arctanh}\left (\frac {\sqrt {c} x}{\sqrt {b x+c x^2}}\right )}{4 c^{5/2}}-\frac {3 b \sqrt {b x+c x^2}}{4 c^2}+\frac {x \sqrt {b x+c x^2}}{2 c} \]
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Rule 212
Rule 634
Rule 654
Rule 684
Rubi steps \begin{align*} \text {integral}& = \frac {x \sqrt {b x+c x^2}}{2 c}-\frac {(3 b) \int \frac {x}{\sqrt {b x+c x^2}} \, dx}{4 c} \\ & = -\frac {3 b \sqrt {b x+c x^2}}{4 c^2}+\frac {x \sqrt {b x+c x^2}}{2 c}+\frac {\left (3 b^2\right ) \int \frac {1}{\sqrt {b x+c x^2}} \, dx}{8 c^2} \\ & = -\frac {3 b \sqrt {b x+c x^2}}{4 c^2}+\frac {x \sqrt {b x+c x^2}}{2 c}+\frac {\left (3 b^2\right ) \text {Subst}\left (\int \frac {1}{1-c x^2} \, dx,x,\frac {x}{\sqrt {b x+c x^2}}\right )}{4 c^2} \\ & = -\frac {3 b \sqrt {b x+c x^2}}{4 c^2}+\frac {x \sqrt {b x+c x^2}}{2 c}+\frac {3 b^2 \tanh ^{-1}\left (\frac {\sqrt {c} x}{\sqrt {b x+c x^2}}\right )}{4 c^{5/2}} \\ \end{align*}
Time = 0.28 (sec) , antiderivative size = 97, normalized size of antiderivative = 1.28 \[ \int \frac {x^2}{\sqrt {b x+c x^2}} \, dx=\frac {\sqrt {c} x \left (-3 b^2-b c x+2 c^2 x^2\right )+6 b^2 \sqrt {x} \sqrt {b+c x} \text {arctanh}\left (\frac {\sqrt {c} \sqrt {x}}{-\sqrt {b}+\sqrt {b+c x}}\right )}{4 c^{5/2} \sqrt {x (b+c x)}} \]
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Time = 2.07 (sec) , antiderivative size = 59, normalized size of antiderivative = 0.78
method | result | size |
pseudoelliptic | \(\frac {2 c^{\frac {3}{2}} \sqrt {x \left (c x +b \right )}\, x +3 \,\operatorname {arctanh}\left (\frac {\sqrt {x \left (c x +b \right )}}{x \sqrt {c}}\right ) b^{2}-3 b \sqrt {c}\, \sqrt {x \left (c x +b \right )}}{4 c^{\frac {5}{2}}}\) | \(59\) |
risch | \(-\frac {\left (-2 c x +3 b \right ) x \left (c x +b \right )}{4 c^{2} \sqrt {x \left (c x +b \right )}}+\frac {3 b^{2} \ln \left (\frac {\frac {b}{2}+c x}{\sqrt {c}}+\sqrt {c \,x^{2}+b x}\right )}{8 c^{\frac {5}{2}}}\) | \(62\) |
default | \(\frac {x \sqrt {c \,x^{2}+b x}}{2 c}-\frac {3 b \left (\frac {\sqrt {c \,x^{2}+b x}}{c}-\frac {b \ln \left (\frac {\frac {b}{2}+c x}{\sqrt {c}}+\sqrt {c \,x^{2}+b x}\right )}{2 c^{\frac {3}{2}}}\right )}{4 c}\) | \(71\) |
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Time = 0.27 (sec) , antiderivative size = 126, normalized size of antiderivative = 1.66 \[ \int \frac {x^2}{\sqrt {b x+c x^2}} \, dx=\left [\frac {3 \, b^{2} \sqrt {c} \log \left (2 \, c x + b + 2 \, \sqrt {c x^{2} + b x} \sqrt {c}\right ) + 2 \, {\left (2 \, c^{2} x - 3 \, b c\right )} \sqrt {c x^{2} + b x}}{8 \, c^{3}}, -\frac {3 \, b^{2} \sqrt {-c} \arctan \left (\frac {\sqrt {c x^{2} + b x} \sqrt {-c}}{c x}\right ) - {\left (2 \, c^{2} x - 3 \, b c\right )} \sqrt {c x^{2} + b x}}{4 \, c^{3}}\right ] \]
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Time = 0.32 (sec) , antiderivative size = 116, normalized size of antiderivative = 1.53 \[ \int \frac {x^2}{\sqrt {b x+c x^2}} \, dx=\begin {cases} \frac {3 b^{2} \left (\begin {cases} \frac {\log {\left (b + 2 \sqrt {c} \sqrt {b x + c x^{2}} + 2 c x \right )}}{\sqrt {c}} & \text {for}\: \frac {b^{2}}{c} \neq 0 \\\frac {\left (\frac {b}{2 c} + x\right ) \log {\left (\frac {b}{2 c} + x \right )}}{\sqrt {c \left (\frac {b}{2 c} + x\right )^{2}}} & \text {otherwise} \end {cases}\right )}{8 c^{2}} + \left (- \frac {3 b}{4 c^{2}} + \frac {x}{2 c}\right ) \sqrt {b x + c x^{2}} & \text {for}\: c \neq 0 \\\frac {2 \left (b x\right )^{\frac {5}{2}}}{5 b^{3}} & \text {for}\: b \neq 0 \\\tilde {\infty } x^{3} & \text {otherwise} \end {cases} \]
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Time = 0.19 (sec) , antiderivative size = 66, normalized size of antiderivative = 0.87 \[ \int \frac {x^2}{\sqrt {b x+c x^2}} \, dx=\frac {\sqrt {c x^{2} + b x} x}{2 \, c} + \frac {3 \, b^{2} \log \left (2 \, c x + b + 2 \, \sqrt {c x^{2} + b x} \sqrt {c}\right )}{8 \, c^{\frac {5}{2}}} - \frac {3 \, \sqrt {c x^{2} + b x} b}{4 \, c^{2}} \]
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Time = 0.30 (sec) , antiderivative size = 63, normalized size of antiderivative = 0.83 \[ \int \frac {x^2}{\sqrt {b x+c x^2}} \, dx=\frac {1}{4} \, \sqrt {c x^{2} + b x} {\left (\frac {2 \, x}{c} - \frac {3 \, b}{c^{2}}\right )} - \frac {3 \, b^{2} \log \left ({\left | 2 \, {\left (\sqrt {c} x - \sqrt {c x^{2} + b x}\right )} \sqrt {c} + b \right |}\right )}{8 \, c^{\frac {5}{2}}} \]
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Timed out. \[ \int \frac {x^2}{\sqrt {b x+c x^2}} \, dx=\int \frac {x^2}{\sqrt {c\,x^2+b\,x}} \,d x \]
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