What is the integral of x/(sqrt(5x+3)) ?

The integral of x/(sqrt(5x+3)) is 2/25 (1/3 (5x+3)^{3/2}-3sqrt(5x+3))+C

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integral of x/(sqrt(5x+3))

\int \frac{x}{5 x + 3} d x

\frac{2}{25} (\frac{1}{3} (5 x + 3)^{\frac{3}{2}} - 3 5 x + 3) + C

Solution steps

\int \frac{x}{5 x + 3} d x

Apply u-substitution

: \int \frac{2 ( u ^{2} - 3 )}{25} d u

= \int \frac{2 ( u ^{2} - 3 )}{25} d u

Take the constant out:

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

= \frac{2}{25} \cdot \int u^{2} - 3 d u

Apply the Sum Rule:

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

= \frac{2}{25} (\int u^{2} d u - \int 3 d u)

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

\int 3 d u = 3 u

= \frac{2}{25} (\frac{u ^{3}}{3} - 3 u)

Substitute back

u = 5 x + 3

= \frac{2}{25} (\frac{( 5 x + 3 ) ^{3}}{3} - 3 5 x + 3)

Simplify

\frac{2}{25} (\frac{( 5 x + 3 ) ^{3}}{3} - 3 5 x + 3) : \frac{2}{25} (\frac{1}{3} (5 x + 3)^{\frac{3}{2}} - 3 5 x + 3)

= \frac{2}{25} (\frac{1}{3} (5 x + 3)^{\frac{3}{2}} - 3 5 x + 3)

Add a constant to the solution

= \frac{2}{25} (\frac{1}{3} (5 x + 3)^{\frac{3}{2}} - 3 5 x + 3) + C

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What is the integral of x/(sqrt(5x+3)) ?
The integral of x/(sqrt(5x+3)) is 2/25 (1/3 (5x+3)^{3/2}-3sqrt(5x+3))+C