Integrand size = 26, antiderivative size = 115 \[ \int \frac {\left (a+b x+c x^2\right )^{3/2}}{b d+2 c d x} \, dx=-\frac {\left (b^2-4 a c\right ) \sqrt {a+b x+c x^2}}{8 c^2 d}+\frac {\left (a+b x+c x^2\right )^{3/2}}{6 c d}+\frac {\left (b^2-4 a c\right )^{3/2} \arctan \left (\frac {2 \sqrt {c} \sqrt {a+b x+c x^2}}{\sqrt {b^2-4 a c}}\right )}{16 c^{5/2} d} \]
1/6*(c*x^2+b*x+a)^(3/2)/c/d+1/16*(-4*a*c+b^2)^(3/2)*arctan(2*c^(1/2)*(c*x^ 2+b*x+a)^(1/2)/(-4*a*c+b^2)^(1/2))/c^(5/2)/d-1/8*(-4*a*c+b^2)*(c*x^2+b*x+a )^(1/2)/c^2/d
Time = 1.19 (sec) , antiderivative size = 124, normalized size of antiderivative = 1.08 \[ \int \frac {\left (a+b x+c x^2\right )^{3/2}}{b d+2 c d x} \, dx=\frac {\sqrt {c} \sqrt {a+x (b+c x)} \left (-3 b^2+4 b c x+4 c \left (4 a+c x^2\right )\right )-3 \left (-b^2+4 a c\right )^{3/2} \text {arctanh}\left (\frac {\sqrt {c} \sqrt {-b^2+4 a c} x}{\sqrt {a} (b+2 c x)-b \sqrt {a+x (b+c x)}}\right )}{24 c^{5/2} d} \]
(Sqrt[c]*Sqrt[a + x*(b + c*x)]*(-3*b^2 + 4*b*c*x + 4*c*(4*a + c*x^2)) - 3* (-b^2 + 4*a*c)^(3/2)*ArcTanh[(Sqrt[c]*Sqrt[-b^2 + 4*a*c]*x)/(Sqrt[a]*(b + 2*c*x) - b*Sqrt[a + x*(b + c*x)])])/(24*c^(5/2)*d)
Time = 0.27 (sec) , antiderivative size = 120, normalized size of antiderivative = 1.04, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.192, Rules used = {1109, 27, 1109, 1112, 218}
Below are the steps used by Rubi to obtain the solution. The rule number used for the transformation is given above next to the arrow. The rules definitions used are listed below.
| \(\displaystyle \int \frac {\left (a+b x+c x^2\right )^{3/2}}{b d+2 c d x} \, dx\) |
| \(\Big \downarrow \) 1109 |
| \(\displaystyle \frac {\left (a+b x+c x^2\right )^{3/2}}{6 c d}-\frac {\left (b^2-4 a c\right ) \int \frac {\sqrt {c x^2+b x+a}}{d (b+2 c x)}dx}{4 c}\) |
| \(\Big \downarrow \) 27 |
| \(\displaystyle \frac {\left (a+b x+c x^2\right )^{3/2}}{6 c d}-\frac {\left (b^2-4 a c\right ) \int \frac {\sqrt {c x^2+b x+a}}{b+2 c x}dx}{4 c d}\) |
| \(\Big \downarrow \) 1109 |
| \(\displaystyle \frac {\left (a+b x+c x^2\right )^{3/2}}{6 c d}-\frac {\left (b^2-4 a c\right ) \left (\frac {\sqrt {a+b x+c x^2}}{2 c}-\frac {\left (b^2-4 a c\right ) \int \frac {1}{(b+2 c x) \sqrt {c x^2+b x+a}}dx}{4 c}\right )}{4 c d}\) |
| \(\Big \downarrow \) 1112 |
| \(\displaystyle \frac {\left (a+b x+c x^2\right )^{3/2}}{6 c d}-\frac {\left (b^2-4 a c\right ) \left (\frac {\sqrt {a+b x+c x^2}}{2 c}-\left (b^2-4 a c\right ) \int \frac {1}{8 \left (c x^2+b x+a\right ) c^2+2 \left (b^2-4 a c\right ) c}d\sqrt {c x^2+b x+a}\right )}{4 c d}\) |
| \(\Big \downarrow \) 218 |
| \(\displaystyle \frac {\left (a+b x+c x^2\right )^{3/2}}{6 c d}-\frac {\left (b^2-4 a c\right ) \left (\frac {\sqrt {a+b x+c x^2}}{2 c}-\frac {\sqrt {b^2-4 a c} \arctan \left (\frac {2 \sqrt {c} \sqrt {a+b x+c x^2}}{\sqrt {b^2-4 a c}}\right )}{4 c^{3/2}}\right )}{4 c d}\) |
(a + b*x + c*x^2)^(3/2)/(6*c*d) - ((b^2 - 4*a*c)*(Sqrt[a + b*x + c*x^2]/(2 *c) - (Sqrt[b^2 - 4*a*c]*ArcTan[(2*Sqrt[c]*Sqrt[a + b*x + c*x^2])/Sqrt[b^2 - 4*a*c]])/(4*c^(3/2))))/(4*c*d)
3.13.7.3.1 Defintions of rubi rules used
Int[(a_)*(Fx_), x_Symbol] :> Simp[a Int[Fx, x], x] /; FreeQ[a, x] && !Ma tchQ[Fx, (b_)*(Gx_) /; FreeQ[b, x]]
Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(Rt[a/b, 2]/a)*ArcTan[x/R t[a/b, 2]], x] /; FreeQ[{a, b}, x] && PosQ[a/b]
Int[((d_) + (e_.)*(x_))^(m_)*((a_.) + (b_.)*(x_) + (c_.)*(x_)^2)^(p_.), x_S ymbol] :> Simp[(d + e*x)^(m + 1)*((a + b*x + c*x^2)^p/(e*(m + 2*p + 1))), x ] - Simp[d*p*((b^2 - 4*a*c)/(b*e*(m + 2*p + 1))) Int[(d + e*x)^m*(a + b*x + c*x^2)^(p - 1), x], x] /; FreeQ[{a, b, c, d, e, m}, x] && EqQ[2*c*d - b* e, 0] && NeQ[m + 2*p + 3, 0] && GtQ[p, 0] && !LtQ[m, -1] && !(IGtQ[(m - 1 )/2, 0] && ( !IntegerQ[p] || LtQ[m, 2*p])) && RationalQ[m] && IntegerQ[2*p]
Int[1/(((d_) + (e_.)*(x_))*Sqrt[(a_.) + (b_.)*(x_) + (c_.)*(x_)^2]), x_Symb ol] :> Simp[4*c Subst[Int[1/(b^2*e - 4*a*c*e + 4*c*e*x^2), x], x, Sqrt[a + b*x + c*x^2]], x] /; FreeQ[{a, b, c, d, e}, x] && EqQ[2*c*d - b*e, 0]
Time = 2.33 (sec) , antiderivative size = 119, normalized size of antiderivative = 1.03
| method | result | size |
| pseudoelliptic | \(-\frac {\left (-\frac {b^{2}}{4}+a c \right )^{2} \operatorname {arctanh}\left (\frac {2 c \sqrt {c \,x^{2}+b x +a}}{\sqrt {4 c^{2} a -b^{2} c}}\right )-\frac {2 \left (\frac {c^{2} x^{2}}{4}+\left (\frac {b x}{4}+a \right ) c -\frac {3 b^{2}}{16}\right ) \sqrt {4 c^{2} a -b^{2} c}\, \sqrt {c \,x^{2}+b x +a}}{3}}{\sqrt {4 c^{2} a -b^{2} c}\, c^{2} d}\) | \(119\) |
| risch | \(\frac {\left (4 c^{2} x^{2}+4 b c x +16 a c -3 b^{2}\right ) \sqrt {c \,x^{2}+b x +a}}{24 c^{2} d}-\frac {\left (16 a^{2} c^{2}-8 a \,b^{2} c +b^{4}\right ) \ln \left (\frac {\frac {4 a c -b^{2}}{2 c}+\frac {\sqrt {\frac {4 a c -b^{2}}{c}}\, \sqrt {4 \left (x +\frac {b}{2 c}\right )^{2} c +\frac {4 a c -b^{2}}{c}}}{2}}{x +\frac {b}{2 c}}\right )}{16 c^{3} \sqrt {\frac {4 a c -b^{2}}{c}}\, d}\) | \(164\) |
| default | \(\frac {\frac {\left (\left (x +\frac {b}{2 c}\right )^{2} c +\frac {4 a c -b^{2}}{4 c}\right )^{\frac {3}{2}}}{3}+\frac {\left (4 a c -b^{2}\right ) \left (\frac {\sqrt {4 \left (x +\frac {b}{2 c}\right )^{2} c +\frac {4 a c -b^{2}}{c}}}{2}-\frac {\left (4 a c -b^{2}\right ) \ln \left (\frac {\frac {4 a c -b^{2}}{2 c}+\frac {\sqrt {\frac {4 a c -b^{2}}{c}}\, \sqrt {4 \left (x +\frac {b}{2 c}\right )^{2} c +\frac {4 a c -b^{2}}{c}}}{2}}{x +\frac {b}{2 c}}\right )}{2 c \sqrt {\frac {4 a c -b^{2}}{c}}}\right )}{4 c}}{2 d c}\) | \(197\) |
-((-1/4*b^2+a*c)^2*arctanh(2*c*(c*x^2+b*x+a)^(1/2)/(4*a*c^2-b^2*c)^(1/2))- 2/3*(1/4*c^2*x^2+(1/4*b*x+a)*c-3/16*b^2)*(4*a*c^2-b^2*c)^(1/2)*(c*x^2+b*x+ a)^(1/2))/(4*a*c^2-b^2*c)^(1/2)/c^2/d
Time = 0.31 (sec) , antiderivative size = 246, normalized size of antiderivative = 2.14 \[ \int \frac {\left (a+b x+c x^2\right )^{3/2}}{b d+2 c d x} \, dx=\left [-\frac {3 \, {\left (b^{2} - 4 \, a c\right )} \sqrt {-\frac {b^{2} - 4 \, a c}{c}} \log \left (-\frac {4 \, c^{2} x^{2} + 4 \, b c x - b^{2} + 8 \, a c - 4 \, \sqrt {c x^{2} + b x + a} c \sqrt {-\frac {b^{2} - 4 \, a c}{c}}}{4 \, c^{2} x^{2} + 4 \, b c x + b^{2}}\right ) - 4 \, {\left (4 \, c^{2} x^{2} + 4 \, b c x - 3 \, b^{2} + 16 \, a c\right )} \sqrt {c x^{2} + b x + a}}{96 \, c^{2} d}, -\frac {3 \, {\left (b^{2} - 4 \, a c\right )} \sqrt {\frac {b^{2} - 4 \, a c}{c}} \arctan \left (\frac {\sqrt {\frac {b^{2} - 4 \, a c}{c}}}{2 \, \sqrt {c x^{2} + b x + a}}\right ) - 2 \, {\left (4 \, c^{2} x^{2} + 4 \, b c x - 3 \, b^{2} + 16 \, a c\right )} \sqrt {c x^{2} + b x + a}}{48 \, c^{2} d}\right ] \]
[-1/96*(3*(b^2 - 4*a*c)*sqrt(-(b^2 - 4*a*c)/c)*log(-(4*c^2*x^2 + 4*b*c*x - b^2 + 8*a*c - 4*sqrt(c*x^2 + b*x + a)*c*sqrt(-(b^2 - 4*a*c)/c))/(4*c^2*x^ 2 + 4*b*c*x + b^2)) - 4*(4*c^2*x^2 + 4*b*c*x - 3*b^2 + 16*a*c)*sqrt(c*x^2 + b*x + a))/(c^2*d), -1/48*(3*(b^2 - 4*a*c)*sqrt((b^2 - 4*a*c)/c)*arctan(1 /2*sqrt((b^2 - 4*a*c)/c)/sqrt(c*x^2 + b*x + a)) - 2*(4*c^2*x^2 + 4*b*c*x - 3*b^2 + 16*a*c)*sqrt(c*x^2 + b*x + a))/(c^2*d)]
\[ \int \frac {\left (a+b x+c x^2\right )^{3/2}}{b d+2 c d x} \, dx=\frac {\int \frac {a \sqrt {a + b x + c x^{2}}}{b + 2 c x}\, dx + \int \frac {b x \sqrt {a + b x + c x^{2}}}{b + 2 c x}\, dx + \int \frac {c x^{2} \sqrt {a + b x + c x^{2}}}{b + 2 c x}\, dx}{d} \]
(Integral(a*sqrt(a + b*x + c*x**2)/(b + 2*c*x), x) + Integral(b*x*sqrt(a + b*x + c*x**2)/(b + 2*c*x), x) + Integral(c*x**2*sqrt(a + b*x + c*x**2)/(b + 2*c*x), x))/d
Exception generated. \[ \int \frac {\left (a+b x+c x^2\right )^{3/2}}{b d+2 c d x} \, dx=\text {Exception raised: ValueError} \]
Exception raised: ValueError >> Computation failed since Maxima requested additional constraints; using the 'assume' command before evaluation *may* help (example of legal syntax is 'assume(4*a*c-b^2>0)', see `assume?` for more deta
Time = 0.29 (sec) , antiderivative size = 149, normalized size of antiderivative = 1.30 \[ \int \frac {\left (a+b x+c x^2\right )^{3/2}}{b d+2 c d x} \, dx=\frac {1}{24} \, \sqrt {c x^{2} + b x + a} {\left (4 \, x {\left (\frac {x}{d} + \frac {b}{c d}\right )} - \frac {3 \, b^{2} c^{3} d^{3} - 16 \, a c^{4} d^{3}}{c^{5} d^{4}}\right )} + \frac {{\left (b^{4} - 8 \, a b^{2} c + 16 \, a^{2} c^{2}\right )} \arctan \left (-\frac {2 \, {\left (\sqrt {c} x - \sqrt {c x^{2} + b x + a}\right )} c + b \sqrt {c}}{\sqrt {b^{2} c - 4 \, a c^{2}}}\right )}{8 \, \sqrt {b^{2} c - 4 \, a c^{2}} c^{2} d} \]
1/24*sqrt(c*x^2 + b*x + a)*(4*x*(x/d + b/(c*d)) - (3*b^2*c^3*d^3 - 16*a*c^ 4*d^3)/(c^5*d^4)) + 1/8*(b^4 - 8*a*b^2*c + 16*a^2*c^2)*arctan(-(2*(sqrt(c) *x - sqrt(c*x^2 + b*x + a))*c + b*sqrt(c))/sqrt(b^2*c - 4*a*c^2))/(sqrt(b^ 2*c - 4*a*c^2)*c^2*d)
Timed out. \[ \int \frac {\left (a+b x+c x^2\right )^{3/2}}{b d+2 c d x} \, dx=\int \frac {{\left (c\,x^2+b\,x+a\right )}^{3/2}}{b\,d+2\,c\,d\,x} \,d x \]