Optimal. Leaf size=72 \[ -\frac {a+b x}{2 \left (a^2-b^2\right ) \left (b+2 a x+b x^2\right )}+\frac {b \tanh ^{-1}\left (\frac {a+b x}{\sqrt {a^2-b^2}}\right )}{2 \left (a^2-b^2\right )^{3/2}} \]
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Rubi [A]
time = 0.02, antiderivative size = 72, normalized size of antiderivative = 1.00, number of steps
used = 3, number of rules used = 3, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.231, Rules used = {628, 632, 212}
\begin {gather*} \frac {b \tanh ^{-1}\left (\frac {a+b x}{\sqrt {a^2-b^2}}\right )}{2 \left (a^2-b^2\right )^{3/2}}-\frac {a+b x}{2 \left (a^2-b^2\right ) \left (2 a x+b x^2+b\right )} \end {gather*}
Antiderivative was successfully verified.
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Rule 212
Rule 628
Rule 632
Rubi steps
\begin {align*} \int \frac {1}{\left (b+2 a x+b x^2\right )^2} \, dx &=-\frac {a+b x}{2 \left (a^2-b^2\right ) \left (b+2 a x+b x^2\right )}-\frac {b \int \frac {1}{b+2 a x+b x^2} \, dx}{2 \left (a^2-b^2\right )}\\ &=-\frac {a+b x}{2 \left (a^2-b^2\right ) \left (b+2 a x+b x^2\right )}+\frac {b \text {Subst}\left (\int \frac {1}{4 \left (a^2-b^2\right )-x^2} \, dx,x,2 a+2 b x\right )}{a^2-b^2}\\ &=-\frac {a+b x}{2 \left (a^2-b^2\right ) \left (b+2 a x+b x^2\right )}+\frac {b \tanh ^{-1}\left (\frac {a+b x}{\sqrt {a^2-b^2}}\right )}{2 \left (a^2-b^2\right )^{3/2}}\\ \end {align*}
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Mathematica [A]
time = 0.03, size = 72, normalized size = 1.00 \begin {gather*} \frac {a+b x}{2 \left (-a^2+b^2\right ) \left (b+2 a x+b x^2\right )}+\frac {b \tan ^{-1}\left (\frac {a+b x}{\sqrt {-a^2+b^2}}\right )}{2 \left (-a^2+b^2\right )^{3/2}} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.58, size = 86, normalized size = 1.19
method | result | size |
default | \(\frac {2 b x +2 a}{\left (-4 a^{2}+4 b^{2}\right ) \left (b \,x^{2}+2 a x +b \right )}+\frac {2 b \arctan \left (\frac {2 b x +2 a}{2 \sqrt {-a^{2}+b^{2}}}\right )}{\left (-4 a^{2}+4 b^{2}\right ) \sqrt {-a^{2}+b^{2}}}\) | \(86\) |
risch | \(\frac {-\frac {b x}{4 \left (a^{2}-b^{2}\right )}-\frac {a}{4 \left (a^{2}-b^{2}\right )}}{\frac {1}{2} b \,x^{2}+a x +\frac {1}{2} b}+\frac {b \ln \left (\left (-a^{2} b +b^{3}\right ) x -\left (a^{2}-b^{2}\right )^{\frac {3}{2}}-a^{3}+a \,b^{2}\right )}{4 \left (a^{2}-b^{2}\right )^{\frac {3}{2}}}-\frac {b \ln \left (\left (a^{2} b -b^{3}\right ) x -\left (a^{2}-b^{2}\right )^{\frac {3}{2}}+a^{3}-a \,b^{2}\right )}{4 \left (a^{2}-b^{2}\right )^{\frac {3}{2}}}\) | \(150\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Exception raised: ValueError} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] Leaf count of result is larger than twice the leaf count of optimal. 144 vs.
\(2 (64) = 128\).
time = 2.75, size = 317, normalized size = 4.40 \begin {gather*} \left [-\frac {2 \, a^{3} - 2 \, a b^{2} + {\left (b^{2} x^{2} + 2 \, a b x + b^{2}\right )} \sqrt {a^{2} - b^{2}} \log \left (\frac {b^{2} x^{2} + 2 \, a b x + 2 \, a^{2} - b^{2} - 2 \, \sqrt {a^{2} - b^{2}} {\left (b x + a\right )}}{b x^{2} + 2 \, a x + b}\right ) + 2 \, {\left (a^{2} b - b^{3}\right )} x}{4 \, {\left (a^{4} b - 2 \, a^{2} b^{3} + b^{5} + {\left (a^{4} b - 2 \, a^{2} b^{3} + b^{5}\right )} x^{2} + 2 \, {\left (a^{5} - 2 \, a^{3} b^{2} + a b^{4}\right )} x\right )}}, -\frac {a^{3} - a b^{2} - {\left (b^{2} x^{2} + 2 \, a b x + b^{2}\right )} \sqrt {-a^{2} + b^{2}} \arctan \left (-\frac {\sqrt {-a^{2} + b^{2}} {\left (b x + a\right )}}{a^{2} - b^{2}}\right ) + {\left (a^{2} b - b^{3}\right )} x}{2 \, {\left (a^{4} b - 2 \, a^{2} b^{3} + b^{5} + {\left (a^{4} b - 2 \, a^{2} b^{3} + b^{5}\right )} x^{2} + 2 \, {\left (a^{5} - 2 \, a^{3} b^{2} + a b^{4}\right )} x\right )}}\right ] \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [B] Leaf count of result is larger than twice the leaf count of optimal. 230 vs.
\(2 (58) = 116\).
time = 0.30, size = 230, normalized size = 3.19 \begin {gather*} - \frac {b \sqrt {\frac {1}{\left (a - b\right )^{3} \left (a + b\right )^{3}}} \log {\left (x + \frac {- a^{4} b \sqrt {\frac {1}{\left (a - b\right )^{3} \left (a + b\right )^{3}}} + 2 a^{2} b^{3} \sqrt {\frac {1}{\left (a - b\right )^{3} \left (a + b\right )^{3}}} + a b - b^{5} \sqrt {\frac {1}{\left (a - b\right )^{3} \left (a + b\right )^{3}}}}{b^{2}} \right )}}{4} + \frac {b \sqrt {\frac {1}{\left (a - b\right )^{3} \left (a + b\right )^{3}}} \log {\left (x + \frac {a^{4} b \sqrt {\frac {1}{\left (a - b\right )^{3} \left (a + b\right )^{3}}} - 2 a^{2} b^{3} \sqrt {\frac {1}{\left (a - b\right )^{3} \left (a + b\right )^{3}}} + a b + b^{5} \sqrt {\frac {1}{\left (a - b\right )^{3} \left (a + b\right )^{3}}}}{b^{2}} \right )}}{4} + \frac {- a - b x}{2 a^{2} b - 2 b^{3} + x^{2} \cdot \left (2 a^{2} b - 2 b^{3}\right ) + x \left (4 a^{3} - 4 a b^{2}\right )} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.71, size = 75, normalized size = 1.04 \begin {gather*} -\frac {b \arctan \left (\frac {b x + a}{\sqrt {-a^{2} + b^{2}}}\right )}{2 \, {\left (a^{2} - b^{2}\right )} \sqrt {-a^{2} + b^{2}}} - \frac {b x + a}{2 \, {\left (b x^{2} + 2 \, a x + b\right )} {\left (a^{2} - b^{2}\right )}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.32, size = 107, normalized size = 1.49 \begin {gather*} -\frac {\frac {a}{2\,\left (a^2-b^2\right )}+\frac {b\,x}{2\,\left (a^2-b^2\right )}}{b\,x^2+2\,a\,x+b}+\frac {b\,\mathrm {atan}\left (\frac {-a^3\,1{}\mathrm {i}-1{}\mathrm {i}\,x\,a^2\,b+a\,b^2\,1{}\mathrm {i}+1{}\mathrm {i}\,x\,b^3}{{\left (a+b\right )}^{3/2}\,{\left (a-b\right )}^{3/2}}\right )\,1{}\mathrm {i}}{2\,{\left (a+b\right )}^{3/2}\,{\left (a-b\right )}^{3/2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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