Optimal. Leaf size=19 \[ -\frac{2 \tan ^{-1}\left (\frac{1-2 x}{\sqrt{7}}\right )}{\sqrt{7}} \]
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Rubi [A] time = 0.0111904, antiderivative size = 19, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 10, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.2, Rules used = {618, 204} \[ -\frac{2 \tan ^{-1}\left (\frac{1-2 x}{\sqrt{7}}\right )}{\sqrt{7}} \]
Antiderivative was successfully verified.
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Rule 618
Rule 204
Rubi steps
\begin{align*} \int \frac{1}{2-x+x^2} \, dx &=-\left (2 \operatorname{Subst}\left (\int \frac{1}{-7-x^2} \, dx,x,-1+2 x\right )\right )\\ &=-\frac{2 \tan ^{-1}\left (\frac{1-2 x}{\sqrt{7}}\right )}{\sqrt{7}}\\ \end{align*}
Mathematica [A] time = 0.0062284, size = 19, normalized size = 1. \[ \frac{2 \tan ^{-1}\left (\frac{2 x-1}{\sqrt{7}}\right )}{\sqrt{7}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.003, size = 17, normalized size = 0.9 \begin{align*}{\frac{2\,\sqrt{7}}{7}\arctan \left ({\frac{ \left ( 2\,x-1 \right ) \sqrt{7}}{7}} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.60247, size = 22, normalized size = 1.16 \begin{align*} \frac{2}{7} \, \sqrt{7} \arctan \left (\frac{1}{7} \, \sqrt{7}{\left (2 \, x - 1\right )}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.23032, size = 58, normalized size = 3.05 \begin{align*} \frac{2}{7} \, \sqrt{7} \arctan \left (\frac{1}{7} \, \sqrt{7}{\left (2 \, x - 1\right )}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.096842, size = 26, normalized size = 1.37 \begin{align*} \frac{2 \sqrt{7} \operatorname{atan}{\left (\frac{2 \sqrt{7} x}{7} - \frac{\sqrt{7}}{7} \right )}}{7} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.12003, size = 22, normalized size = 1.16 \begin{align*} \frac{2}{7} \, \sqrt{7} \arctan \left (\frac{1}{7} \, \sqrt{7}{\left (2 \, x - 1\right )}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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