Integrand size = 19, antiderivative size = 52 \[ \int x^2 \sqrt {b x^2+c x^4} \, dx=-\frac {2 b \left (b x^2+c x^4\right )^{3/2}}{15 c^2 x^3}+\frac {\left (b x^2+c x^4\right )^{3/2}}{5 c x} \]
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Time = 0.03 (sec) , antiderivative size = 52, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.105, Rules used = {2041, 2025} \[ \int x^2 \sqrt {b x^2+c x^4} \, dx=\frac {\left (b x^2+c x^4\right )^{3/2}}{5 c x}-\frac {2 b \left (b x^2+c x^4\right )^{3/2}}{15 c^2 x^3} \]
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Rule 2025
Rule 2041
Rubi steps \begin{align*} \text {integral}& = \frac {\left (b x^2+c x^4\right )^{3/2}}{5 c x}-\frac {(2 b) \int \sqrt {b x^2+c x^4} \, dx}{5 c} \\ & = -\frac {2 b \left (b x^2+c x^4\right )^{3/2}}{15 c^2 x^3}+\frac {\left (b x^2+c x^4\right )^{3/2}}{5 c x} \\ \end{align*}
Time = 0.03 (sec) , antiderivative size = 45, normalized size of antiderivative = 0.87 \[ \int x^2 \sqrt {b x^2+c x^4} \, dx=\frac {\sqrt {x^2 \left (b+c x^2\right )} \left (-2 b^2+b c x^2+3 c^2 x^4\right )}{15 c^2 x} \]
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Time = 0.21 (sec) , antiderivative size = 39, normalized size of antiderivative = 0.75
method | result | size |
gosper | \(-\frac {\left (c \,x^{2}+b \right ) \left (-3 c \,x^{2}+2 b \right ) \sqrt {c \,x^{4}+b \,x^{2}}}{15 c^{2} x}\) | \(39\) |
default | \(-\frac {\left (c \,x^{2}+b \right ) \left (-3 c \,x^{2}+2 b \right ) \sqrt {c \,x^{4}+b \,x^{2}}}{15 c^{2} x}\) | \(39\) |
trager | \(-\frac {\left (-3 c^{2} x^{4}-b c \,x^{2}+2 b^{2}\right ) \sqrt {c \,x^{4}+b \,x^{2}}}{15 c^{2} x}\) | \(43\) |
risch | \(-\frac {\sqrt {x^{2} \left (c \,x^{2}+b \right )}\, \left (-3 c^{2} x^{4}-b c \,x^{2}+2 b^{2}\right )}{15 x \,c^{2}}\) | \(43\) |
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Time = 0.25 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.79 \[ \int x^2 \sqrt {b x^2+c x^4} \, dx=\frac {{\left (3 \, c^{2} x^{4} + b c x^{2} - 2 \, b^{2}\right )} \sqrt {c x^{4} + b x^{2}}}{15 \, c^{2} x} \]
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\[ \int x^2 \sqrt {b x^2+c x^4} \, dx=\int x^{2} \sqrt {x^{2} \left (b + c x^{2}\right )}\, dx \]
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Time = 0.20 (sec) , antiderivative size = 34, normalized size of antiderivative = 0.65 \[ \int x^2 \sqrt {b x^2+c x^4} \, dx=\frac {{\left (3 \, c^{2} x^{4} + b c x^{2} - 2 \, b^{2}\right )} \sqrt {c x^{2} + b}}{15 \, c^{2}} \]
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Time = 0.26 (sec) , antiderivative size = 44, normalized size of antiderivative = 0.85 \[ \int x^2 \sqrt {b x^2+c x^4} \, dx=\frac {2 \, b^{\frac {5}{2}} \mathrm {sgn}\left (x\right )}{15 \, c^{2}} + \frac {3 \, {\left (c x^{2} + b\right )}^{\frac {5}{2}} \mathrm {sgn}\left (x\right ) - 5 \, {\left (c x^{2} + b\right )}^{\frac {3}{2}} b \mathrm {sgn}\left (x\right )}{15 \, c^{2}} \]
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Time = 12.88 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.79 \[ \int x^2 \sqrt {b x^2+c x^4} \, dx=\frac {\sqrt {c\,x^4+b\,x^2}\,\left (-2\,b^2+b\,c\,x^2+3\,c^2\,x^4\right )}{15\,c^2\,x} \]
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