What is the integral of x/(sqrt(2x+3)) ?

The integral of x/(sqrt(2x+3)) is 1/3 (x-3)sqrt(2x+3)+C

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

integral of x/(sqrt(2x+3))

\int \frac{x}{2 x + 3} d x

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

Solution steps

\int \frac{x}{2 x + 3} d x

Apply u-substitution

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

Take the constant out:

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

= \frac{1}{2} \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{1}{2} (\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{1}{2} (\frac{u ^{3}}{3} - 3 u)

Substitute back

u = 2 x + 3

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

Simplify

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

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

Add a constant to the solution

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

What is the integral of x/(sqrt(2x+3)) ?
The integral of x/(sqrt(2x+3)) is 1/3 (x-3)sqrt(2x+3)+C