Integrand size = 22, antiderivative size = 77 \[ \int x \left (a+b x^2\right )^2 \sqrt {c+d x^2} \, dx=\frac {(b c-a d)^2 \left (c+d x^2\right )^{3/2}}{3 d^3}-\frac {2 b (b c-a d) \left (c+d x^2\right )^{5/2}}{5 d^3}+\frac {b^2 \left (c+d x^2\right )^{7/2}}{7 d^3} \]
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Time = 0.04 (sec) , antiderivative size = 77, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.091, Rules used = {455, 45} \[ \int x \left (a+b x^2\right )^2 \sqrt {c+d x^2} \, dx=-\frac {2 b \left (c+d x^2\right )^{5/2} (b c-a d)}{5 d^3}+\frac {\left (c+d x^2\right )^{3/2} (b c-a d)^2}{3 d^3}+\frac {b^2 \left (c+d x^2\right )^{7/2}}{7 d^3} \]
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Rule 45
Rule 455
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} \text {Subst}\left (\int (a+b x)^2 \sqrt {c+d x} \, dx,x,x^2\right ) \\ & = \frac {1}{2} \text {Subst}\left (\int \left (\frac {(-b c+a d)^2 \sqrt {c+d x}}{d^2}-\frac {2 b (b c-a d) (c+d x)^{3/2}}{d^2}+\frac {b^2 (c+d x)^{5/2}}{d^2}\right ) \, dx,x,x^2\right ) \\ & = \frac {(b c-a d)^2 \left (c+d x^2\right )^{3/2}}{3 d^3}-\frac {2 b (b c-a d) \left (c+d x^2\right )^{5/2}}{5 d^3}+\frac {b^2 \left (c+d x^2\right )^{7/2}}{7 d^3} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 67, normalized size of antiderivative = 0.87 \[ \int x \left (a+b x^2\right )^2 \sqrt {c+d x^2} \, dx=\frac {\left (c+d x^2\right )^{3/2} \left (35 a^2 d^2+14 a b d \left (-2 c+3 d x^2\right )+b^2 \left (8 c^2-12 c d x^2+15 d^2 x^4\right )\right )}{105 d^3} \]
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Time = 2.87 (sec) , antiderivative size = 60, normalized size of antiderivative = 0.78
method | result | size |
pseudoelliptic | \(\frac {\left (\left (\frac {3}{7} b^{2} x^{4}+\frac {6}{5} a b \,x^{2}+a^{2}\right ) d^{2}-\frac {4 \left (\frac {3 b \,x^{2}}{7}+a \right ) b c d}{5}+\frac {8 b^{2} c^{2}}{35}\right ) \left (d \,x^{2}+c \right )^{\frac {3}{2}}}{3 d^{3}}\) | \(60\) |
gosper | \(\frac {\left (d \,x^{2}+c \right )^{\frac {3}{2}} \left (15 b^{2} d^{2} x^{4}+42 x^{2} a b \,d^{2}-12 x^{2} b^{2} c d +35 a^{2} d^{2}-28 a b c d +8 b^{2} c^{2}\right )}{105 d^{3}}\) | \(69\) |
trager | \(\frac {\left (15 b^{2} d^{3} x^{6}+42 a b \,d^{3} x^{4}+3 b^{2} c \,d^{2} x^{4}+35 a^{2} d^{3} x^{2}+14 a b c \,d^{2} x^{2}-4 b^{2} c^{2} d \,x^{2}+35 c \,a^{2} d^{2}-28 a b \,c^{2} d +8 b^{2} c^{3}\right ) \sqrt {d \,x^{2}+c}}{105 d^{3}}\) | \(108\) |
risch | \(\frac {\left (15 b^{2} d^{3} x^{6}+42 a b \,d^{3} x^{4}+3 b^{2} c \,d^{2} x^{4}+35 a^{2} d^{3} x^{2}+14 a b c \,d^{2} x^{2}-4 b^{2} c^{2} d \,x^{2}+35 c \,a^{2} d^{2}-28 a b \,c^{2} d +8 b^{2} c^{3}\right ) \sqrt {d \,x^{2}+c}}{105 d^{3}}\) | \(108\) |
default | \(b^{2} \left (\frac {x^{4} \left (d \,x^{2}+c \right )^{\frac {3}{2}}}{7 d}-\frac {4 c \left (\frac {x^{2} \left (d \,x^{2}+c \right )^{\frac {3}{2}}}{5 d}-\frac {2 c \left (d \,x^{2}+c \right )^{\frac {3}{2}}}{15 d^{2}}\right )}{7 d}\right )+\frac {a^{2} \left (d \,x^{2}+c \right )^{\frac {3}{2}}}{3 d}+2 a b \left (\frac {x^{2} \left (d \,x^{2}+c \right )^{\frac {3}{2}}}{5 d}-\frac {2 c \left (d \,x^{2}+c \right )^{\frac {3}{2}}}{15 d^{2}}\right )\) | \(117\) |
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Time = 0.26 (sec) , antiderivative size = 103, normalized size of antiderivative = 1.34 \[ \int x \left (a+b x^2\right )^2 \sqrt {c+d x^2} \, dx=\frac {{\left (15 \, b^{2} d^{3} x^{6} + 8 \, b^{2} c^{3} - 28 \, a b c^{2} d + 35 \, a^{2} c d^{2} + 3 \, {\left (b^{2} c d^{2} + 14 \, a b d^{3}\right )} x^{4} - {\left (4 \, b^{2} c^{2} d - 14 \, a b c d^{2} - 35 \, a^{2} d^{3}\right )} x^{2}\right )} \sqrt {d x^{2} + c}}{105 \, d^{3}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 226 vs. \(2 (66) = 132\).
Time = 0.25 (sec) , antiderivative size = 226, normalized size of antiderivative = 2.94 \[ \int x \left (a+b x^2\right )^2 \sqrt {c+d x^2} \, dx=\begin {cases} \frac {a^{2} c \sqrt {c + d x^{2}}}{3 d} + \frac {a^{2} x^{2} \sqrt {c + d x^{2}}}{3} - \frac {4 a b c^{2} \sqrt {c + d x^{2}}}{15 d^{2}} + \frac {2 a b c x^{2} \sqrt {c + d x^{2}}}{15 d} + \frac {2 a b x^{4} \sqrt {c + d x^{2}}}{5} + \frac {8 b^{2} c^{3} \sqrt {c + d x^{2}}}{105 d^{3}} - \frac {4 b^{2} c^{2} x^{2} \sqrt {c + d x^{2}}}{105 d^{2}} + \frac {b^{2} c x^{4} \sqrt {c + d x^{2}}}{35 d} + \frac {b^{2} x^{6} \sqrt {c + d x^{2}}}{7} & \text {for}\: d \neq 0 \\\sqrt {c} \left (\frac {a^{2} x^{2}}{2} + \frac {a b x^{4}}{2} + \frac {b^{2} x^{6}}{6}\right ) & \text {otherwise} \end {cases} \]
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Time = 0.19 (sec) , antiderivative size = 115, normalized size of antiderivative = 1.49 \[ \int x \left (a+b x^2\right )^2 \sqrt {c+d x^2} \, dx=\frac {{\left (d x^{2} + c\right )}^{\frac {3}{2}} b^{2} x^{4}}{7 \, d} - \frac {4 \, {\left (d x^{2} + c\right )}^{\frac {3}{2}} b^{2} c x^{2}}{35 \, d^{2}} + \frac {2 \, {\left (d x^{2} + c\right )}^{\frac {3}{2}} a b x^{2}}{5 \, d} + \frac {8 \, {\left (d x^{2} + c\right )}^{\frac {3}{2}} b^{2} c^{2}}{105 \, d^{3}} - \frac {4 \, {\left (d x^{2} + c\right )}^{\frac {3}{2}} a b c}{15 \, d^{2}} + \frac {{\left (d x^{2} + c\right )}^{\frac {3}{2}} a^{2}}{3 \, d} \]
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Time = 0.28 (sec) , antiderivative size = 98, normalized size of antiderivative = 1.27 \[ \int x \left (a+b x^2\right )^2 \sqrt {c+d x^2} \, dx=\frac {15 \, {\left (d x^{2} + c\right )}^{\frac {7}{2}} b^{2} - 42 \, {\left (d x^{2} + c\right )}^{\frac {5}{2}} b^{2} c + 35 \, {\left (d x^{2} + c\right )}^{\frac {3}{2}} b^{2} c^{2} + 42 \, {\left (d x^{2} + c\right )}^{\frac {5}{2}} a b d - 70 \, {\left (d x^{2} + c\right )}^{\frac {3}{2}} a b c d + 35 \, {\left (d x^{2} + c\right )}^{\frac {3}{2}} a^{2} d^{2}}{105 \, d^{3}} \]
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Time = 5.15 (sec) , antiderivative size = 101, normalized size of antiderivative = 1.31 \[ \int x \left (a+b x^2\right )^2 \sqrt {c+d x^2} \, dx=\sqrt {d\,x^2+c}\,\left (\frac {35\,a^2\,c\,d^2-28\,a\,b\,c^2\,d+8\,b^2\,c^3}{105\,d^3}+\frac {b^2\,x^6}{7}+\frac {x^2\,\left (35\,a^2\,d^3+14\,a\,b\,c\,d^2-4\,b^2\,c^2\,d\right )}{105\,d^3}+\frac {b\,x^4\,\left (14\,a\,d+b\,c\right )}{35\,d}\right ) \]
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