What is the integral of sqrt(9-3x) ?

The integral of sqrt(9-3x) is -2/9 (9-3x)^{3/2}+C

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integral of sqrt(9-3x)

\int 9 - 3 x d x

- \frac{2}{9} (9 - 3 x)^{\frac{3}{2}} + C

Solution steps

\int 9 - 3 x d x

Apply u-substitution

= \int - \frac{u}{3} d u

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= - \frac{1}{3} \cdot \int u d u

Apply the Power Rule

= - \frac{1}{3} \cdot \frac{2}{3} u^{\frac{3}{2}}

Substitute back

u = 9 - 3 x

= - \frac{1}{3} \cdot \frac{2}{3} (9 - 3 x)^{\frac{3}{2}}

Simplify

- \frac{1}{3} \cdot \frac{2}{3} (9 - 3 x)^{\frac{3}{2}} : - \frac{2}{9} (9 - 3 x)^{\frac{3}{2}}

= - \frac{2}{9} (9 - 3 x)^{\frac{3}{2}}

Add a constant to the solution

= - \frac{2}{9} (9 - 3 x)^{\frac{3}{2}} + C

What is the integral of sqrt(9-3x) ?
The integral of sqrt(9-3x) is -2/9 (9-3x)^{3/2}+C