3.3.44 \(\int \frac {1}{\sqrt {5+2 x+x^2} (-8+x^3)} \, dx\) [244]

Optimal. Leaf size=82 \[ -\frac {\tan ^{-1}\left (\frac {1+x}{\sqrt {3} \sqrt {5+2 x+x^2}}\right )}{4 \sqrt {3}}-\frac {\tanh ^{-1}\left (\frac {7+3 x}{\sqrt {13} \sqrt {5+2 x+x^2}}\right )}{12 \sqrt {13}}+\frac {1}{12} \tanh ^{-1}\left (\sqrt {5+2 x+x^2}\right ) \]

[Out]

1/12*arctanh((x^2+2*x+5)^(1/2))-1/12*arctan(1/3*(1+x)*3^(1/2)/(x^2+2*x+5)^(1/2))*3^(1/2)-1/156*arctanh(1/13*(7
+3*x)*13^(1/2)/(x^2+2*x+5)^(1/2))*13^(1/2)

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Rubi [A]
time = 0.08, antiderivative size = 82, normalized size of antiderivative = 1.00, number of steps used = 9, number of rules used = 7, integrand size = 20, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.350, Rules used = {2099, 738, 212, 1039, 996, 210, 1038} \begin {gather*} -\frac {\text {ArcTan}\left (\frac {x+1}{\sqrt {3} \sqrt {x^2+2 x+5}}\right )}{4 \sqrt {3}}-\frac {\tanh ^{-1}\left (\frac {3 x+7}{\sqrt {13} \sqrt {x^2+2 x+5}}\right )}{12 \sqrt {13}}+\frac {1}{12} \tanh ^{-1}\left (\sqrt {x^2+2 x+5}\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Int[1/(Sqrt[5 + 2*x + x^2]*(-8 + x^3)),x]

[Out]

-1/4*ArcTan[(1 + x)/(Sqrt[3]*Sqrt[5 + 2*x + x^2])]/Sqrt[3] - ArcTanh[(7 + 3*x)/(Sqrt[13]*Sqrt[5 + 2*x + x^2])]
/(12*Sqrt[13]) + ArcTanh[Sqrt[5 + 2*x + x^2]]/12

Rule 210

Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(-(Rt[-a, 2]*Rt[-b, 2])^(-1))*ArcTan[Rt[-b, 2]*(x/Rt[-a, 2])
], x] /; FreeQ[{a, b}, x] && PosQ[a/b] && (LtQ[a, 0] || LtQ[b, 0])

Rule 212

Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(1/(Rt[a, 2]*Rt[-b, 2]))*ArcTanh[Rt[-b, 2]*(x/Rt[a, 2])], x]
/; FreeQ[{a, b}, x] && NegQ[a/b] && (GtQ[a, 0] || LtQ[b, 0])

Rule 738

Int[1/(((d_.) + (e_.)*(x_))*Sqrt[(a_.) + (b_.)*(x_) + (c_.)*(x_)^2]), x_Symbol] :> Dist[-2, Subst[Int[1/(4*c*d
^2 - 4*b*d*e + 4*a*e^2 - x^2), x], x, (2*a*e - b*d - (2*c*d - b*e)*x)/Sqrt[a + b*x + c*x^2]], x] /; FreeQ[{a,
b, c, d, e}, x] && NeQ[b^2 - 4*a*c, 0] && NeQ[2*c*d - b*e, 0]

Rule 996

Int[1/(((a_) + (b_.)*(x_) + (c_.)*(x_)^2)*Sqrt[(d_.) + (e_.)*(x_) + (f_.)*(x_)^2]), x_Symbol] :> Dist[-2*e, Su
bst[Int[1/(e*(b*e - 4*a*f) - (b*d - a*e)*x^2), x], x, (e + 2*f*x)/Sqrt[d + e*x + f*x^2]], x] /; FreeQ[{a, b, c
, d, e, f}, x] && NeQ[b^2 - 4*a*c, 0] && NeQ[e^2 - 4*d*f, 0] && EqQ[c*e - b*f, 0]

Rule 1038

Int[((g_) + (h_.)*(x_))/(((a_) + (b_.)*(x_) + (c_.)*(x_)^2)*Sqrt[(d_.) + (e_.)*(x_) + (f_.)*(x_)^2]), x_Symbol
] :> Dist[-2*g, Subst[Int[1/(b*d - a*e - b*x^2), x], x, Sqrt[d + e*x + f*x^2]], x] /; FreeQ[{a, b, c, d, e, f,
g, h}, x] && NeQ[b^2 - 4*a*c, 0] && NeQ[e^2 - 4*d*f, 0] && EqQ[c*e - b*f, 0] && EqQ[h*e - 2*g*f, 0]

Rule 1039

Int[((g_.) + (h_.)*(x_))/(((a_) + (b_.)*(x_) + (c_.)*(x_)^2)*Sqrt[(d_.) + (e_.)*(x_) + (f_.)*(x_)^2]), x_Symbo
l] :> Dist[-(h*e - 2*g*f)/(2*f), Int[1/((a + b*x + c*x^2)*Sqrt[d + e*x + f*x^2]), x], x] + Dist[h/(2*f), Int[(
e + 2*f*x)/((a + b*x + c*x^2)*Sqrt[d + e*x + f*x^2]), x], x] /; FreeQ[{a, b, c, d, e, f, g, h}, x] && NeQ[b^2
- 4*a*c, 0] && NeQ[e^2 - 4*d*f, 0] && EqQ[c*e - b*f, 0] && NeQ[h*e - 2*g*f, 0]

Rule 2099

Int[(P_)^(p_)*(Q_)^(q_.), x_Symbol] :> With[{PP = Factor[P]}, Int[ExpandIntegrand[PP^p*Q^q, x], x] /;  !SumQ[N
onfreeFactors[PP, x]]] /; FreeQ[q, x] && PolyQ[P, x] && PolyQ[Q, x] && IntegerQ[p] && NeQ[P, x]

Rubi steps

\begin {align*} \int \frac {1}{\sqrt {5+2 x+x^2} \left (-8+x^3\right )} \, dx &=\int \left (\frac {1}{12 (-2+x) \sqrt {5+2 x+x^2}}+\frac {-4-x}{12 \left (4+2 x+x^2\right ) \sqrt {5+2 x+x^2}}\right ) \, dx\\ &=\frac {1}{12} \int \frac {1}{(-2+x) \sqrt {5+2 x+x^2}} \, dx+\frac {1}{12} \int \frac {-4-x}{\left (4+2 x+x^2\right ) \sqrt {5+2 x+x^2}} \, dx\\ &=-\left (\frac {1}{24} \int \frac {2+2 x}{\left (4+2 x+x^2\right ) \sqrt {5+2 x+x^2}} \, dx\right )-\frac {1}{6} \text {Subst}\left (\int \frac {1}{52-x^2} \, dx,x,\frac {14+6 x}{\sqrt {5+2 x+x^2}}\right )-\frac {1}{4} \int \frac {1}{\left (4+2 x+x^2\right ) \sqrt {5+2 x+x^2}} \, dx\\ &=-\frac {\tanh ^{-1}\left (\frac {7+3 x}{\sqrt {13} \sqrt {5+2 x+x^2}}\right )}{12 \sqrt {13}}+\frac {1}{6} \text {Subst}\left (\int \frac {1}{2-2 x^2} \, dx,x,\sqrt {5+2 x+x^2}\right )+\text {Subst}\left (\int \frac {1}{-24-2 x^2} \, dx,x,\frac {2+2 x}{\sqrt {5+2 x+x^2}}\right )\\ &=-\frac {\tan ^{-1}\left (\frac {2+2 x}{2 \sqrt {3} \sqrt {5+2 x+x^2}}\right )}{4 \sqrt {3}}-\frac {\tanh ^{-1}\left (\frac {7+3 x}{\sqrt {13} \sqrt {5+2 x+x^2}}\right )}{12 \sqrt {13}}+\frac {1}{12} \tanh ^{-1}\left (\sqrt {5+2 x+x^2}\right )\\ \end {align*}

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Mathematica [A]
time = 0.24, size = 90, normalized size = 1.10 \begin {gather*} \frac {1}{156} \left (13 \sqrt {3} \tan ^{-1}\left (\frac {4+2 x+x^2-(1+x) \sqrt {5+2 x+x^2}}{\sqrt {3}}\right )+13 \tanh ^{-1}\left (\sqrt {5+2 x+x^2}\right )-2 \sqrt {13} \tanh ^{-1}\left (\frac {2-x+\sqrt {5+2 x+x^2}}{\sqrt {13}}\right )\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[1/(Sqrt[5 + 2*x + x^2]*(-8 + x^3)),x]

[Out]

(13*Sqrt[3]*ArcTan[(4 + 2*x + x^2 - (1 + x)*Sqrt[5 + 2*x + x^2])/Sqrt[3]] + 13*ArcTanh[Sqrt[5 + 2*x + x^2]] -
2*Sqrt[13]*ArcTanh[(2 - x + Sqrt[5 + 2*x + x^2])/Sqrt[13]])/156

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Maple [A]
time = 0.36, size = 69, normalized size = 0.84

method	result	size
default	\(-\frac {\sqrt {13}\, \arctanh \left (\frac {\left (14+6 x \right ) \sqrt {13}}{26 \sqrt {\left (-2+x \right )^{2}+1+6 x}}\right )}{156}+\frac {\arctanh \left (\sqrt {x^{2}+2 x +5}\right )}{12}-\frac {\sqrt {3}\, \arctan \left (\frac {\sqrt {3}\, \left (2+2 x \right )}{6 \sqrt {x^{2}+2 x +5}}\right )}{12}\)	\(69\)
trager	\(-\frac {\ln \left (-\frac {5760 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )^{2} x +252 \sqrt {x^{2}+2 x +5}\, \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )+348 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right ) x +5 \sqrt {x^{2}+2 x +5}-1140 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )+3 x -57}{6 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right ) x -1}\right )}{12}-\ln \left (-\frac {5760 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )^{2} x +252 \sqrt {x^{2}+2 x +5}\, \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )+348 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right ) x +5 \sqrt {x^{2}+2 x +5}-1140 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )+3 x -57}{6 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right ) x -1}\right ) \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )+\RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right ) \ln \left (\frac {-2880 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )^{2} x +126 \sqrt {x^{2}+2 x +5}\, \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )-306 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right ) x +8 \sqrt {x^{2}+2 x +5}-570 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right )-7 x -19}{12 \RootOf \left (144 \textit {\_Z}^{2}+12 \textit {\_Z} +1\right ) x +x +2}\right )+\frac {\RootOf \left (\textit {\_Z}^{2}-13\right ) \ln \left (-\frac {-3 \RootOf \left (\textit {\_Z}^{2}-13\right ) x +13 \sqrt {x^{2}+2 x +5}-7 \RootOf \left (\textit {\_Z}^{2}-13\right )}{-2+x}\right )}{156}\)	\(387\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(x^3-8)/(x^2+2*x+5)^(1/2),x,method=_RETURNVERBOSE)

[Out]

-1/156*13^(1/2)*arctanh(1/26*(14+6*x)*13^(1/2)/((-2+x)^2+1+6*x)^(1/2))+1/12*arctanh((x^2+2*x+5)^(1/2))-1/12*3^
(1/2)*arctan(1/6*3^(1/2)/(x^2+2*x+5)^(1/2)*(2+2*x))

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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(x^3-8)/(x^2+2*x+5)^(1/2),x, algorithm="maxima")

[Out]

integrate(1/((x^3 - 8)*sqrt(x^2 + 2*x + 5)), x)

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Fricas [B] Leaf count of result is larger than twice the leaf count of optimal. 151 vs. \(2 (64) = 128\).
time = 0.39, size = 151, normalized size = 1.84 \begin {gather*} \frac {1}{12} \, \sqrt {3} \arctan \left (-\frac {1}{3} \, \sqrt {3} {\left (x + 2\right )} + \frac {1}{3} \, \sqrt {3} \sqrt {x^{2} + 2 \, x + 5}\right ) - \frac {1}{12} \, \sqrt {3} \arctan \left (-\frac {1}{3} \, \sqrt {3} x + \frac {1}{3} \, \sqrt {3} \sqrt {x^{2} + 2 \, x + 5}\right ) + \frac {1}{156} \, \sqrt {13} \log \left (\frac {\sqrt {13} {\left (3 \, x + 7\right )} + \sqrt {x^{2} + 2 \, x + 5} {\left (3 \, \sqrt {13} - 13\right )} - 9 \, x - 21}{x - 2}\right ) - \frac {1}{24} \, \log \left (x^{2} - \sqrt {x^{2} + 2 \, x + 5} {\left (x + 2\right )} + 3 \, x + 6\right ) + \frac {1}{24} \, \log \left (x^{2} - \sqrt {x^{2} + 2 \, x + 5} x + x + 4\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(x^3-8)/(x^2+2*x+5)^(1/2),x, algorithm="fricas")

[Out]

1/12*sqrt(3)*arctan(-1/3*sqrt(3)*(x + 2) + 1/3*sqrt(3)*sqrt(x^2 + 2*x + 5)) - 1/12*sqrt(3)*arctan(-1/3*sqrt(3)
*x + 1/3*sqrt(3)*sqrt(x^2 + 2*x + 5)) + 1/156*sqrt(13)*log((sqrt(13)*(3*x + 7) + sqrt(x^2 + 2*x + 5)*(3*sqrt(1
3) - 13) - 9*x - 21)/(x - 2)) - 1/24*log(x^2 - sqrt(x^2 + 2*x + 5)*(x + 2) + 3*x + 6) + 1/24*log(x^2 - sqrt(x^
2 + 2*x + 5)*x + x + 4)

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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {1}{\left (x - 2\right ) \left (x^{2} + 2 x + 4\right ) \sqrt {x^{2} + 2 x + 5}}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(x**3-8)/(x**2+2*x+5)**(1/2),x)

[Out]

Integral(1/((x - 2)*(x**2 + 2*x + 4)*sqrt(x**2 + 2*x + 5)), x)

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Giac [B] Leaf count of result is larger than twice the leaf count of optimal. 164 vs. \(2 (64) = 128\).
time = 0.53, size = 164, normalized size = 2.00 \begin {gather*} \frac {1}{12} \, \sqrt {3} \arctan \left (-\frac {1}{3} \, \sqrt {3} {\left (x - \sqrt {x^{2} + 2 \, x + 5} + 2\right )}\right ) - \frac {1}{12} \, \sqrt {3} \arctan \left (-\frac {1}{3} \, \sqrt {3} {\left (x - \sqrt {x^{2} + 2 \, x + 5}\right )}\right ) + \frac {1}{156} \, \sqrt {13} \log \left (\frac {{\left | -2 \, x - 2 \, \sqrt {13} + 2 \, \sqrt {x^{2} + 2 \, x + 5} + 4 \right |}}{{\left | -2 \, x + 2 \, \sqrt {13} + 2 \, \sqrt {x^{2} + 2 \, x + 5} + 4 \right |}}\right ) - \frac {1}{24} \, \log \left ({\left (x - \sqrt {x^{2} + 2 \, x + 5}\right )}^{2} + 4 \, x - 4 \, \sqrt {x^{2} + 2 \, x + 5} + 7\right ) + \frac {1}{24} \, \log \left ({\left (x - \sqrt {x^{2} + 2 \, x + 5}\right )}^{2} + 3\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(x^3-8)/(x^2+2*x+5)^(1/2),x, algorithm="giac")

[Out]

1/12*sqrt(3)*arctan(-1/3*sqrt(3)*(x - sqrt(x^2 + 2*x + 5) + 2)) - 1/12*sqrt(3)*arctan(-1/3*sqrt(3)*(x - sqrt(x
^2 + 2*x + 5))) + 1/156*sqrt(13)*log(abs(-2*x - 2*sqrt(13) + 2*sqrt(x^2 + 2*x + 5) + 4)/abs(-2*x + 2*sqrt(13)
+ 2*sqrt(x^2 + 2*x + 5) + 4)) - 1/24*log((x - sqrt(x^2 + 2*x + 5))^2 + 4*x - 4*sqrt(x^2 + 2*x + 5) + 7) + 1/24
*log((x - sqrt(x^2 + 2*x + 5))^2 + 3)

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Mupad [F]
time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int \frac {1}{\left (x^3-8\right )\,\sqrt {x^2+2\,x+5}} \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/((x^3 - 8)*(2*x + x^2 + 5)^(1/2)),x)

[Out]

int(1/((x^3 - 8)*(2*x + x^2 + 5)^(1/2)), x)

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