3.21.82 \(\int \frac {x}{\sqrt {2+5 x+3 x^2}} \, dx\)

Optimal. Leaf size=57 \[ \frac {1}{3} \sqrt {3 x^2+5 x+2}-\frac {5 \tanh ^{-1}\left (\frac {6 x+5}{2 \sqrt {3} \sqrt {3 x^2+5 x+2}}\right )}{6 \sqrt {3}} \]

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Rubi [A]  time = 0.01, antiderivative size = 57, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.188, Rules used = {640, 621, 206} \begin {gather*} \frac {1}{3} \sqrt {3 x^2+5 x+2}-\frac {5 \tanh ^{-1}\left (\frac {6 x+5}{2 \sqrt {3} \sqrt {3 x^2+5 x+2}}\right )}{6 \sqrt {3}} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[x/Sqrt[2 + 5*x + 3*x^2],x]

[Out]

Sqrt[2 + 5*x + 3*x^2]/3 - (5*ArcTanh[(5 + 6*x)/(2*Sqrt[3]*Sqrt[2 + 5*x + 3*x^2])])/(6*Sqrt[3])

Rule 206

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

Rule 621

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

Rule 640

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

Rubi steps

\begin {align*} \int \frac {x}{\sqrt {2+5 x+3 x^2}} \, dx &=\frac {1}{3} \sqrt {2+5 x+3 x^2}-\frac {5}{6} \int \frac {1}{\sqrt {2+5 x+3 x^2}} \, dx\\ &=\frac {1}{3} \sqrt {2+5 x+3 x^2}-\frac {5}{3} \operatorname {Subst}\left (\int \frac {1}{12-x^2} \, dx,x,\frac {5+6 x}{\sqrt {2+5 x+3 x^2}}\right )\\ &=\frac {1}{3} \sqrt {2+5 x+3 x^2}-\frac {5 \tanh ^{-1}\left (\frac {5+6 x}{2 \sqrt {3} \sqrt {2+5 x+3 x^2}}\right )}{6 \sqrt {3}}\\ \end {align*}

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Mathematica [A]  time = 0.02, size = 52, normalized size = 0.91 \begin {gather*} \frac {1}{18} \left (6 \sqrt {3 x^2+5 x+2}-5 \sqrt {3} \tanh ^{-1}\left (\frac {6 x+5}{2 \sqrt {9 x^2+15 x+6}}\right )\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[x/Sqrt[2 + 5*x + 3*x^2],x]

[Out]

(6*Sqrt[2 + 5*x + 3*x^2] - 5*Sqrt[3]*ArcTanh[(5 + 6*x)/(2*Sqrt[6 + 15*x + 9*x^2])])/18

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IntegrateAlgebraic [A]  time = 0.13, size = 54, normalized size = 0.95 \begin {gather*} \frac {1}{3} \sqrt {3 x^2+5 x+2}-\frac {5 \tanh ^{-1}\left (\frac {\sqrt {3 x^2+5 x+2}}{\sqrt {3} (x+1)}\right )}{3 \sqrt {3}} \end {gather*}

Antiderivative was successfully verified.

[In]

IntegrateAlgebraic[x/Sqrt[2 + 5*x + 3*x^2],x]

[Out]

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

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fricas [A]  time = 0.41, size = 53, normalized size = 0.93 \begin {gather*} \frac {5}{36} \, \sqrt {3} \log \left (-4 \, \sqrt {3} \sqrt {3 \, x^{2} + 5 \, x + 2} {\left (6 \, x + 5\right )} + 72 \, x^{2} + 120 \, x + 49\right ) + \frac {1}{3} \, \sqrt {3 \, x^{2} + 5 \, x + 2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

5/36*sqrt(3)*log(-4*sqrt(3)*sqrt(3*x^2 + 5*x + 2)*(6*x + 5) + 72*x^2 + 120*x + 49) + 1/3*sqrt(3*x^2 + 5*x + 2)

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giac [A]  time = 0.21, size = 49, normalized size = 0.86 \begin {gather*} \frac {5}{18} \, \sqrt {3} \log \left ({\left | -2 \, \sqrt {3} {\left (\sqrt {3} x - \sqrt {3 \, x^{2} + 5 \, x + 2}\right )} - 5 \right |}\right ) + \frac {1}{3} \, \sqrt {3 \, x^{2} + 5 \, x + 2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

5/18*sqrt(3)*log(abs(-2*sqrt(3)*(sqrt(3)*x - sqrt(3*x^2 + 5*x + 2)) - 5)) + 1/3*sqrt(3*x^2 + 5*x + 2)

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maple [A]  time = 0.05, size = 45, normalized size = 0.79 \begin {gather*} -\frac {5 \sqrt {3}\, \ln \left (\frac {\left (3 x +\frac {5}{2}\right ) \sqrt {3}}{3}+\sqrt {3 x^{2}+5 x +2}\right )}{18}+\frac {\sqrt {3 x^{2}+5 x +2}}{3} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/3*(3*x^2+5*x+2)^(1/2)-5/18*ln(1/3*(5/2+3*x)*3^(1/2)+(3*x^2+5*x+2)^(1/2))*3^(1/2)

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maxima [A]  time = 1.97, size = 43, normalized size = 0.75 \begin {gather*} -\frac {5}{18} \, \sqrt {3} \log \left (2 \, \sqrt {3} \sqrt {3 \, x^{2} + 5 \, x + 2} + 6 \, x + 5\right ) + \frac {1}{3} \, \sqrt {3 \, x^{2} + 5 \, x + 2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-5/18*sqrt(3)*log(2*sqrt(3)*sqrt(3*x^2 + 5*x + 2) + 6*x + 5) + 1/3*sqrt(3*x^2 + 5*x + 2)

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mupad [B]  time = 1.09, size = 44, normalized size = 0.77 \begin {gather*} \frac {\sqrt {3\,x^2+5\,x+2}}{3}-\frac {5\,\sqrt {3}\,\ln \left (\sqrt {3\,x^2+5\,x+2}+\frac {\sqrt {3}\,\left (3\,x+\frac {5}{2}\right )}{3}\right )}{18} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x/(5*x + 3*x^2 + 2)^(1/2),x)

[Out]

(5*x + 3*x^2 + 2)^(1/2)/3 - (5*3^(1/2)*log((5*x + 3*x^2 + 2)^(1/2) + (3^(1/2)*(3*x + 5/2))/3))/18

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sympy [F]  time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {x}{\sqrt {\left (x + 1\right ) \left (3 x + 2\right )}}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

Integral(x/sqrt((x + 1)*(3*x + 2)), x)

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