Integrand size = 20, antiderivative size = 126 \[ \int \sqrt {x} \sqrt {a+b x} (A+B x) \, dx=\frac {a (2 A b-a B) \sqrt {x} \sqrt {a+b x}}{8 b^2}+\frac {(2 A b-a B) x^{3/2} \sqrt {a+b x}}{4 b}+\frac {B x^{3/2} (a+b x)^{3/2}}{3 b}-\frac {a^2 (2 A b-a B) \text {arctanh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a+b x}}\right )}{8 b^{5/2}} \]
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Time = 0.04 (sec) , antiderivative size = 126, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {81, 52, 65, 223, 212} \[ \int \sqrt {x} \sqrt {a+b x} (A+B x) \, dx=-\frac {a^2 (2 A b-a B) \text {arctanh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a+b x}}\right )}{8 b^{5/2}}+\frac {a \sqrt {x} \sqrt {a+b x} (2 A b-a B)}{8 b^2}+\frac {x^{3/2} \sqrt {a+b x} (2 A b-a B)}{4 b}+\frac {B x^{3/2} (a+b x)^{3/2}}{3 b} \]
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Rule 52
Rule 65
Rule 81
Rule 212
Rule 223
Rubi steps \begin{align*} \text {integral}& = \frac {B x^{3/2} (a+b x)^{3/2}}{3 b}+\frac {\left (3 A b-\frac {3 a B}{2}\right ) \int \sqrt {x} \sqrt {a+b x} \, dx}{3 b} \\ & = \frac {(2 A b-a B) x^{3/2} \sqrt {a+b x}}{4 b}+\frac {B x^{3/2} (a+b x)^{3/2}}{3 b}+\frac {(a (2 A b-a B)) \int \frac {\sqrt {x}}{\sqrt {a+b x}} \, dx}{8 b} \\ & = \frac {a (2 A b-a B) \sqrt {x} \sqrt {a+b x}}{8 b^2}+\frac {(2 A b-a B) x^{3/2} \sqrt {a+b x}}{4 b}+\frac {B x^{3/2} (a+b x)^{3/2}}{3 b}-\frac {\left (a^2 (2 A b-a B)\right ) \int \frac {1}{\sqrt {x} \sqrt {a+b x}} \, dx}{16 b^2} \\ & = \frac {a (2 A b-a B) \sqrt {x} \sqrt {a+b x}}{8 b^2}+\frac {(2 A b-a B) x^{3/2} \sqrt {a+b x}}{4 b}+\frac {B x^{3/2} (a+b x)^{3/2}}{3 b}-\frac {\left (a^2 (2 A b-a B)\right ) \text {Subst}\left (\int \frac {1}{\sqrt {a+b x^2}} \, dx,x,\sqrt {x}\right )}{8 b^2} \\ & = \frac {a (2 A b-a B) \sqrt {x} \sqrt {a+b x}}{8 b^2}+\frac {(2 A b-a B) x^{3/2} \sqrt {a+b x}}{4 b}+\frac {B x^{3/2} (a+b x)^{3/2}}{3 b}-\frac {\left (a^2 (2 A b-a B)\right ) \text {Subst}\left (\int \frac {1}{1-b x^2} \, dx,x,\frac {\sqrt {x}}{\sqrt {a+b x}}\right )}{8 b^2} \\ & = \frac {a (2 A b-a B) \sqrt {x} \sqrt {a+b x}}{8 b^2}+\frac {(2 A b-a B) x^{3/2} \sqrt {a+b x}}{4 b}+\frac {B x^{3/2} (a+b x)^{3/2}}{3 b}-\frac {a^2 (2 A b-a B) \tanh ^{-1}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a+b x}}\right )}{8 b^{5/2}} \\ \end{align*}
Time = 0.37 (sec) , antiderivative size = 105, normalized size of antiderivative = 0.83 \[ \int \sqrt {x} \sqrt {a+b x} (A+B x) \, dx=\frac {\sqrt {x} \sqrt {a+b x} \left (-3 a^2 B+2 a b (3 A+B x)+4 b^2 x (3 A+2 B x)\right )}{24 b^2}+\frac {a^2 (-2 A b+a B) \text {arctanh}\left (\frac {\sqrt {b} \sqrt {x}}{-\sqrt {a}+\sqrt {a+b x}}\right )}{4 b^{5/2}} \]
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Time = 0.50 (sec) , antiderivative size = 111, normalized size of antiderivative = 0.88
method | result | size |
risch | \(\frac {\left (8 b^{2} B \,x^{2}+12 A \,b^{2} x +2 B a b x +6 a b A -3 a^{2} B \right ) \sqrt {x}\, \sqrt {b x +a}}{24 b^{2}}-\frac {a^{2} \left (2 A b -B a \right ) \ln \left (\frac {\frac {a}{2}+b x}{\sqrt {b}}+\sqrt {b \,x^{2}+a x}\right ) \sqrt {x \left (b x +a \right )}}{16 b^{\frac {5}{2}} \sqrt {x}\, \sqrt {b x +a}}\) | \(111\) |
default | \(-\frac {\sqrt {x}\, \sqrt {b x +a}\, \left (-16 B \,b^{\frac {5}{2}} x^{2} \sqrt {x \left (b x +a \right )}-24 A \,b^{\frac {5}{2}} \sqrt {x \left (b x +a \right )}\, x -4 B \,b^{\frac {3}{2}} \sqrt {x \left (b x +a \right )}\, a x +6 A \ln \left (\frac {2 \sqrt {x \left (b x +a \right )}\, \sqrt {b}+2 b x +a}{2 \sqrt {b}}\right ) a^{2} b -12 A \,b^{\frac {3}{2}} \sqrt {x \left (b x +a \right )}\, a -3 B \ln \left (\frac {2 \sqrt {x \left (b x +a \right )}\, \sqrt {b}+2 b x +a}{2 \sqrt {b}}\right ) a^{3}+6 B \sqrt {b}\, \sqrt {x \left (b x +a \right )}\, a^{2}\right )}{48 b^{\frac {5}{2}} \sqrt {x \left (b x +a \right )}}\) | \(176\) |
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Time = 0.23 (sec) , antiderivative size = 197, normalized size of antiderivative = 1.56 \[ \int \sqrt {x} \sqrt {a+b x} (A+B x) \, dx=\left [-\frac {3 \, {\left (B a^{3} - 2 \, A a^{2} b\right )} \sqrt {b} \log \left (2 \, b x - 2 \, \sqrt {b x + a} \sqrt {b} \sqrt {x} + a\right ) - 2 \, {\left (8 \, B b^{3} x^{2} - 3 \, B a^{2} b + 6 \, A a b^{2} + 2 \, {\left (B a b^{2} + 6 \, A b^{3}\right )} x\right )} \sqrt {b x + a} \sqrt {x}}{48 \, b^{3}}, -\frac {3 \, {\left (B a^{3} - 2 \, A a^{2} b\right )} \sqrt {-b} \arctan \left (\frac {\sqrt {b x + a} \sqrt {-b}}{b \sqrt {x}}\right ) - {\left (8 \, B b^{3} x^{2} - 3 \, B a^{2} b + 6 \, A a b^{2} + 2 \, {\left (B a b^{2} + 6 \, A b^{3}\right )} x\right )} \sqrt {b x + a} \sqrt {x}}{24 \, b^{3}}\right ] \]
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Time = 0.82 (sec) , antiderivative size = 207, normalized size of antiderivative = 1.64 \[ \int \sqrt {x} \sqrt {a+b x} (A+B x) \, dx=2 A \left (\begin {cases} - \frac {a^{2} \left (\begin {cases} \frac {\log {\left (2 \sqrt {b} \sqrt {a + b x} + 2 b \sqrt {x} \right )}}{\sqrt {b}} & \text {for}\: a \neq 0 \\\frac {\sqrt {x} \log {\left (\sqrt {x} \right )}}{\sqrt {b x}} & \text {otherwise} \end {cases}\right )}{8 b} + \sqrt {a + b x} \left (\frac {a \sqrt {x}}{8 b} + \frac {x^{\frac {3}{2}}}{4}\right ) & \text {for}\: b \neq 0 \\\frac {\sqrt {a} x^{\frac {3}{2}}}{3} & \text {otherwise} \end {cases}\right ) + 2 B \left (\begin {cases} \frac {a^{3} \left (\begin {cases} \frac {\log {\left (2 \sqrt {b} \sqrt {a + b x} + 2 b \sqrt {x} \right )}}{\sqrt {b}} & \text {for}\: a \neq 0 \\\frac {\sqrt {x} \log {\left (\sqrt {x} \right )}}{\sqrt {b x}} & \text {otherwise} \end {cases}\right )}{16 b^{2}} + \sqrt {a + b x} \left (- \frac {a^{2} \sqrt {x}}{16 b^{2}} + \frac {a x^{\frac {3}{2}}}{24 b} + \frac {x^{\frac {5}{2}}}{6}\right ) & \text {for}\: b \neq 0 \\\frac {\sqrt {a} x^{\frac {5}{2}}}{5} & \text {otherwise} \end {cases}\right ) \]
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Time = 0.22 (sec) , antiderivative size = 154, normalized size of antiderivative = 1.22 \[ \int \sqrt {x} \sqrt {a+b x} (A+B x) \, dx=\frac {1}{2} \, \sqrt {b x^{2} + a x} A x - \frac {\sqrt {b x^{2} + a x} B a x}{4 \, b} + \frac {B a^{3} \log \left (2 \, b x + a + 2 \, \sqrt {b x^{2} + a x} \sqrt {b}\right )}{16 \, b^{\frac {5}{2}}} - \frac {A a^{2} \log \left (2 \, b x + a + 2 \, \sqrt {b x^{2} + a x} \sqrt {b}\right )}{8 \, b^{\frac {3}{2}}} - \frac {\sqrt {b x^{2} + a x} B a^{2}}{8 \, b^{2}} + \frac {{\left (b x^{2} + a x\right )}^{\frac {3}{2}} B}{3 \, b} + \frac {\sqrt {b x^{2} + a x} A a}{4 \, b} \]
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Timed out. \[ \int \sqrt {x} \sqrt {a+b x} (A+B x) \, dx=\text {Timed out} \]
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Time = 10.63 (sec) , antiderivative size = 399, normalized size of antiderivative = 3.17 \[ \int \sqrt {x} \sqrt {a+b x} (A+B x) \, dx=\frac {\frac {x^{11/2}\,\left (\frac {A\,a^2\,b^4}{2}-\frac {B\,a^3\,b^3}{4}\right )}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^{11}}+\frac {x^{9/2}\,\left (\frac {17\,B\,a^3\,b^2}{12}+\frac {5\,A\,a^2\,b^3}{2}\right )}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^9}-\frac {x^{7/2}\,\left (3\,A\,a^2\,b^2-\frac {19\,B\,a^3\,b}{2}\right )}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^7}+\frac {x^{5/2}\,\left (\frac {19\,B\,a^3}{2}-3\,A\,a^2\,b\right )}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^5}-\frac {\sqrt {x}\,\left (B\,a^3-2\,A\,a^2\,b\right )}{4\,b^2\,\left (\sqrt {a+b\,x}-\sqrt {a}\right )}+\frac {x^{3/2}\,\left (17\,B\,a^3+30\,A\,b\,a^2\right )}{12\,b\,{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^3}}{\frac {15\,b^2\,x^2}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^4}-\frac {20\,b^3\,x^3}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^6}+\frac {15\,b^4\,x^4}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^8}-\frac {6\,b^5\,x^5}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^{10}}+\frac {b^6\,x^6}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^{12}}-\frac {6\,b\,x}{{\left (\sqrt {a+b\,x}-\sqrt {a}\right )}^2}+1}-\frac {a^2\,\mathrm {atanh}\left (\frac {\sqrt {b}\,\sqrt {x}}{\sqrt {a+b\,x}-\sqrt {a}}\right )\,\left (2\,A\,b-B\,a\right )}{4\,b^{5/2}} \]
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