What is the integral of ((4x-5))/((x-2)(x+3)) ?

The integral of ((4x-5))/((x-2)(x+3)) is 17/5 ln|x+3|+3/5 ln|x-2|+C

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

integral of ((4x-5))/((x-2)(x+3))

\int \frac{( 4 x - 5 )}{( x - 2 ) ( x + 3 )} d x

\frac{17}{5} ln ∣ x + 3 ∣ + \frac{3}{5} ln ∣ x - 2 ∣ + C

Solution steps

\int \frac{4 x - 5}{( x - 2 ) ( x + 3 )} d x

Apply u-substitution

= \int \frac{4 u - 17}{u ( u - 5 )} d u

Take the partial fraction of

\frac{4 u - 17}{u ( u - 5 )} : \frac{17}{5 u} + \frac{3}{5 ( u - 5 )}

= \int \frac{17}{5 u} + \frac{3}{5 ( u - 5 )} 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

= \int \frac{17}{5 u} d u + \int \frac{3}{5 ( u - 5 )} d u

\int \frac{17}{5 u} d u = \frac{17}{5} ln ∣ u ∣

\int \frac{3}{5 ( u - 5 )} d u = \frac{3}{5} ln ∣ u - 5 ∣

= \frac{17}{5} ln ∣ u ∣ + \frac{3}{5} ln ∣ u - 5 ∣

Substitute back

u = x + 3

= \frac{17}{5} ln ∣ x + 3 ∣ + \frac{3}{5} ln ∣ x + 3 - 5 ∣

Simplify

\frac{17}{5} ln ∣ x + 3 ∣ + \frac{3}{5} ln ∣ x + 3 - 5 ∣ : \frac{17}{5} ln ∣ x + 3 ∣ + \frac{3}{5} ln ∣ x - 2 ∣

= \frac{17}{5} ln ∣ x + 3 ∣ + \frac{3}{5} ln ∣ x - 2 ∣

Add a constant to the solution

= \frac{17}{5} ln ∣ x + 3 ∣ + \frac{3}{5} ln ∣ x - 2 ∣ + C

What is the integral of ((4x-5))/((x-2)(x+3)) ?
The integral of ((4x-5))/((x-2)(x+3)) is 17/5 ln|x+3|+3/5 ln|x-2|+C