3.57 \(\int \log ^2(x) \, dx\)

Optimal. Leaf size=15 \[ 2 x+x \log ^2(x)-2 x \log (x) \]

[Out]

2*x-2*x*ln(x)+x*ln(x)^2

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Rubi [A]  time = 0.00, antiderivative size = 15, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {2296, 2295} \[ 2 x+x \log ^2(x)-2 x \log (x) \]

Antiderivative was successfully verified.

[In]

Int[Log[x]^2,x]

[Out]

2*x - 2*x*Log[x] + x*Log[x]^2

Rule 2295

Int[Log[(c_.)*(x_)^(n_.)], x_Symbol] :> Simp[x*Log[c*x^n], x] - Simp[n*x, x] /; FreeQ[{c, n}, x]

Rule 2296

Int[((a_.) + Log[(c_.)*(x_)^(n_.)]*(b_.))^(p_.), x_Symbol] :> Simp[x*(a + b*Log[c*x^n])^p, x] - Dist[b*n*p, In
t[(a + b*Log[c*x^n])^(p - 1), x], x] /; FreeQ[{a, b, c, n}, x] && GtQ[p, 0] && IntegerQ[2*p]

Rubi steps

\begin {align*} \int \log ^2(x) \, dx &=x \log ^2(x)-2 \int \log (x) \, dx\\ &=2 x-2 x \log (x)+x \log ^2(x)\\ \end {align*}

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Mathematica [A]  time = 0.00, size = 15, normalized size = 1.00 \[ 2 x+x \log ^2(x)-2 x \log (x) \]

Antiderivative was successfully verified.

[In]

Integrate[Log[x]^2,x]

[Out]

2*x - 2*x*Log[x] + x*Log[x]^2

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fricas [A]  time = 0.42, size = 15, normalized size = 1.00 \[ x \log \relax (x)^{2} - 2 \, x \log \relax (x) + 2 \, x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(log(x)^2,x, algorithm="fricas")

[Out]

x*log(x)^2 - 2*x*log(x) + 2*x

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giac [A]  time = 0.91, size = 15, normalized size = 1.00 \[ x \log \relax (x)^{2} - 2 \, x \log \relax (x) + 2 \, x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(log(x)^2,x, algorithm="giac")

[Out]

x*log(x)^2 - 2*x*log(x) + 2*x

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maple [A]  time = 0.00, size = 16, normalized size = 1.07 \[ x \ln \relax (x )^{2}-2 x \ln \relax (x )+2 x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(ln(x)^2,x)

[Out]

x*ln(x)^2-2*x*ln(x)+2*x

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maxima [A]  time = 0.43, size = 12, normalized size = 0.80 \[ {\left (\log \relax (x)^{2} - 2 \, \log \relax (x) + 2\right )} x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(log(x)^2,x, algorithm="maxima")

[Out]

(log(x)^2 - 2*log(x) + 2)*x

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mupad [B]  time = 0.03, size = 12, normalized size = 0.80 \[ x\,\left ({\ln \relax (x)}^2-2\,\ln \relax (x)+2\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(log(x)^2,x)

[Out]

x*(log(x)^2 - 2*log(x) + 2)

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sympy [A]  time = 0.09, size = 15, normalized size = 1.00 \[ x \log {\relax (x )}^{2} - 2 x \log {\relax (x )} + 2 x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(ln(x)**2,x)

[Out]

x*log(x)**2 - 2*x*log(x) + 2*x

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