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

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

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integral of (x+3)sqrt(x)

\int (x + 3) x d x

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

Solution steps

\int (x + 3) x d x

Expand

(x + 3) x : 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

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