What is the integral of sqrt(x)(x-3) ?

The integral of sqrt(x)(x-3) is 2/5 x^{5/2}-2x^{3/2}+C

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integral of sqrt(x)(x-3)

\int x (x - 3) d x

\frac{2}{5} x^{\frac{5}{2}} - 2 x^{\frac{3}{2}} + C

Solution steps

\int x (x - 3) d x

Expand

x (x - 3) : x^{\frac{3}{2}} - 3 x

= \int x^{\frac{3}{2}} - 3 x d x

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int x^{\frac{3}{2}} d x - \int 3 x d x

\int x^{\frac{3}{2}} d x = \frac{2}{5} x^{\frac{5}{2}}

\int 3 x d x = 2 x^{\frac{3}{2}}

= \frac{2}{5} x^{\frac{5}{2}} - 2 x^{\frac{3}{2}}

Add a constant to the solution

= \frac{2}{5} x^{\frac{5}{2}} - 2 x^{\frac{3}{2}} + C

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What is the integral of sqrt(x)(x-3) ?
The integral of sqrt(x)(x-3) is 2/5 x^{5/2}-2x^{3/2}+C