What is the integral of (1-x)/(x^2+2x+1) ?

The integral of (1-x)/(x^2+2x+1) is -2/(x+1)-ln|x+1|+C

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

integral of (1-x)/(x^2+2x+1)

\int \frac{1 - x}{x ^{2} + 2 x + 1} d x

- \frac{2}{x + 1} - ln ∣ x + 1 ∣ + C

Solution steps

\int \frac{1 - x}{x ^{2} + 2 x + 1} d x

Expand

\frac{1 - x}{x ^{2} + 2 x + 1} : \frac{1}{x ^{2} + 2 x + 1} - \frac{x}{x ^{2} + 2 x + 1}

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{1}{x ^{2} + 2 x + 1} d x - \int \frac{x}{x ^{2} + 2 x + 1} d x

\int \frac{1}{x ^{2} + 2 x + 1} d x = - \frac{1}{x + 1}

\int \frac{x}{x ^{2} + 2 x + 1} d x = ln ∣ x + 1 ∣ + \frac{1}{x + 1}

= - \frac{1}{x + 1} - (ln ∣ x + 1 ∣ + \frac{1}{x + 1})

Simplify

- \frac{1}{x + 1} - (ln ∣ x + 1 ∣ + \frac{1}{x + 1}) : - \frac{2}{x + 1} - ln ∣ x + 1 ∣

= - \frac{2}{x + 1} - ln ∣ x + 1 ∣

Add a constant to the solution

= - \frac{2}{x + 1} - ln ∣ x + 1 ∣ + C

What is the integral of (1-x)/(x^2+2x+1) ?
The integral of (1-x)/(x^2+2x+1) is -2/(x+1)-ln|x+1|+C