Optimal. Leaf size=119 \[ -\frac{\left (3 b^2-4 a c\right ) \tanh ^{-1}\left (\frac{x (2 a+b x)}{2 \sqrt{a} \sqrt{a x^2+b x^3+c x^4}}\right )}{8 a^{5/2}}+\frac{3 b \sqrt{a x^2+b x^3+c x^4}}{4 a^2 x^2}-\frac{\sqrt{a x^2+b x^3+c x^4}}{2 a x^3} \]
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Rubi [A] time = 0.148656, antiderivative size = 119, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 5, integrand size = 24, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.208, Rules used = {1929, 1951, 12, 1904, 206} \[ -\frac{\left (3 b^2-4 a c\right ) \tanh ^{-1}\left (\frac{x (2 a+b x)}{2 \sqrt{a} \sqrt{a x^2+b x^3+c x^4}}\right )}{8 a^{5/2}}+\frac{3 b \sqrt{a x^2+b x^3+c x^4}}{4 a^2 x^2}-\frac{\sqrt{a x^2+b x^3+c x^4}}{2 a x^3} \]
Antiderivative was successfully verified.
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Rule 1929
Rule 1951
Rule 12
Rule 1904
Rule 206
Rubi steps
\begin{align*} \int \frac{1}{x^2 \sqrt{a x^2+b x^3+c x^4}} \, dx &=-\frac{\sqrt{a x^2+b x^3+c x^4}}{2 a x^3}+\frac{\int \frac{-\frac{3 b}{2}-c x}{x \sqrt{a x^2+b x^3+c x^4}} \, dx}{2 a}\\ &=-\frac{\sqrt{a x^2+b x^3+c x^4}}{2 a x^3}+\frac{3 b \sqrt{a x^2+b x^3+c x^4}}{4 a^2 x^2}-\frac{\int \frac{-\frac{3 b^2}{4}+a c}{\sqrt{a x^2+b x^3+c x^4}} \, dx}{2 a^2}\\ &=-\frac{\sqrt{a x^2+b x^3+c x^4}}{2 a x^3}+\frac{3 b \sqrt{a x^2+b x^3+c x^4}}{4 a^2 x^2}+\frac{\left (3 b^2-4 a c\right ) \int \frac{1}{\sqrt{a x^2+b x^3+c x^4}} \, dx}{8 a^2}\\ &=-\frac{\sqrt{a x^2+b x^3+c x^4}}{2 a x^3}+\frac{3 b \sqrt{a x^2+b x^3+c x^4}}{4 a^2 x^2}-\frac{\left (3 b^2-4 a c\right ) \operatorname{Subst}\left (\int \frac{1}{4 a-x^2} \, dx,x,\frac{x (2 a+b x)}{\sqrt{a x^2+b x^3+c x^4}}\right )}{4 a^2}\\ &=-\frac{\sqrt{a x^2+b x^3+c x^4}}{2 a x^3}+\frac{3 b \sqrt{a x^2+b x^3+c x^4}}{4 a^2 x^2}-\frac{\left (3 b^2-4 a c\right ) \tanh ^{-1}\left (\frac{x (2 a+b x)}{2 \sqrt{a} \sqrt{a x^2+b x^3+c x^4}}\right )}{8 a^{5/2}}\\ \end{align*}
Mathematica [A] time = 0.0955229, size = 112, normalized size = 0.94 \[ \frac{x^2 \left (-\left (3 b^2-4 a c\right )\right ) \sqrt{a+x (b+c x)} \tanh ^{-1}\left (\frac{2 a+b x}{2 \sqrt{a} \sqrt{a+x (b+c x)}}\right )-2 \sqrt{a} (2 a-3 b x) (a+x (b+c x))}{8 a^{5/2} x \sqrt{x^2 (a+x (b+c x))}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.006, size = 152, normalized size = 1.3 \begin{align*} -{\frac{1}{8\,x}\sqrt{c{x}^{2}+bx+a} \left ( 4\,\sqrt{c{x}^{2}+bx+a}{a}^{5/2}-6\,{a}^{3/2}\sqrt{c{x}^{2}+bx+a}xb-4\,c\ln \left ({\frac{2\,a+bx+2\,\sqrt{a}\sqrt{c{x}^{2}+bx+a}}{x}} \right ){a}^{2}{x}^{2}+3\,\ln \left ({\frac{2\,a+bx+2\,\sqrt{a}\sqrt{c{x}^{2}+bx+a}}{x}} \right ){x}^{2}a{b}^{2} \right ){\frac{1}{\sqrt{c{x}^{4}+b{x}^{3}+a{x}^{2}}}}{a}^{-{\frac{7}{2}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{c x^{4} + b x^{3} + a x^{2}} x^{2}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.7908, size = 527, normalized size = 4.43 \begin{align*} \left [-\frac{{\left (3 \, b^{2} - 4 \, a c\right )} \sqrt{a} x^{3} \log \left (-\frac{8 \, a b x^{2} +{\left (b^{2} + 4 \, a c\right )} x^{3} + 8 \, a^{2} x + 4 \, \sqrt{c x^{4} + b x^{3} + a x^{2}}{\left (b x + 2 \, a\right )} \sqrt{a}}{x^{3}}\right ) - 4 \, \sqrt{c x^{4} + b x^{3} + a x^{2}}{\left (3 \, a b x - 2 \, a^{2}\right )}}{16 \, a^{3} x^{3}}, \frac{{\left (3 \, b^{2} - 4 \, a c\right )} \sqrt{-a} x^{3} \arctan \left (\frac{\sqrt{c x^{4} + b x^{3} + a x^{2}}{\left (b x + 2 \, a\right )} \sqrt{-a}}{2 \,{\left (a c x^{3} + a b x^{2} + a^{2} x\right )}}\right ) + 2 \, \sqrt{c x^{4} + b x^{3} + a x^{2}}{\left (3 \, a b x - 2 \, a^{2}\right )}}{8 \, a^{3} x^{3}}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{x^{2} \sqrt{x^{2} \left (a + b x + c x^{2}\right )}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: NotImplementedError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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