Integrand size = 14, antiderivative size = 25 \[ \int \frac {1}{\sqrt {-5+12 x+9 x^2}} \, dx=\frac {1}{3} \text {arctanh}\left (\frac {2+3 x}{\sqrt {-5+12 x+9 x^2}}\right ) \]
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Time = 0.00 (sec) , antiderivative size = 25, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.143, Rules used = {635, 212} \[ \int \frac {1}{\sqrt {-5+12 x+9 x^2}} \, dx=\frac {1}{3} \text {arctanh}\left (\frac {3 x+2}{\sqrt {9 x^2+12 x-5}}\right ) \]
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Rule 212
Rule 635
Rubi steps \begin{align*} \text {integral}& = 2 \text {Subst}\left (\int \frac {1}{36-x^2} \, dx,x,\frac {12+18 x}{\sqrt {-5+12 x+9 x^2}}\right ) \\ & = \frac {1}{3} \text {arctanh}\left (\frac {2+3 x}{\sqrt {-5+12 x+9 x^2}}\right ) \\ \end{align*}
Time = 0.07 (sec) , antiderivative size = 24, normalized size of antiderivative = 0.96 \[ \int \frac {1}{\sqrt {-5+12 x+9 x^2}} \, dx=-\frac {1}{3} \log \left (-2-3 x+\sqrt {-5+12 x+9 x^2}\right ) \]
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Time = 0.22 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.84
method | result | size |
trager | \(-\frac {\ln \left (-2-3 x +\sqrt {9 x^{2}+12 x -5}\right )}{3}\) | \(21\) |
default | \(\frac {\ln \left (\frac {\left (9 x +6\right ) \sqrt {9}}{9}+\sqrt {9 x^{2}+12 x -5}\right ) \sqrt {9}}{9}\) | \(30\) |
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Time = 0.25 (sec) , antiderivative size = 20, normalized size of antiderivative = 0.80 \[ \int \frac {1}{\sqrt {-5+12 x+9 x^2}} \, dx=-\frac {1}{3} \, \log \left (-3 \, x + \sqrt {9 \, x^{2} + 12 \, x - 5} - 2\right ) \]
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Time = 0.31 (sec) , antiderivative size = 22, normalized size of antiderivative = 0.88 \[ \int \frac {1}{\sqrt {-5+12 x+9 x^2}} \, dx=\frac {\log {\left (18 x + 6 \sqrt {9 x^{2} + 12 x - 5} + 12 \right )}}{3} \]
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Time = 0.27 (sec) , antiderivative size = 22, normalized size of antiderivative = 0.88 \[ \int \frac {1}{\sqrt {-5+12 x+9 x^2}} \, dx=\frac {1}{3} \, \log \left (18 \, x + 6 \, \sqrt {9 \, x^{2} + 12 \, x - 5} + 12\right ) \]
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Time = 0.32 (sec) , antiderivative size = 41, normalized size of antiderivative = 1.64 \[ \int \frac {1}{\sqrt {-5+12 x+9 x^2}} \, dx=\frac {1}{6} \, \sqrt {9 \, x^{2} + 12 \, x - 5} {\left (3 \, x + 2\right )} + \frac {3}{2} \, \log \left ({\left | -3 \, x + \sqrt {9 \, x^{2} + 12 \, x - 5} - 2 \right |}\right ) \]
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Time = 0.34 (sec) , antiderivative size = 20, normalized size of antiderivative = 0.80 \[ \int \frac {1}{\sqrt {-5+12 x+9 x^2}} \, dx=\frac {\ln \left (3\,x+\sqrt {9\,x^2+12\,x-5}+2\right )}{3} \]
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