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

The integral of (x^2-x)/(x+1) is ((x+1)^2)/2-3(x+1)+2ln|x+1|+C

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

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

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

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

Solution steps

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

Apply u-substitution

: \int \frac{u ^{2} - 3 u + 2}{u} d u

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

Expand

\frac{u ^{2} - 3 u + 2}{u} : u - 3 + \frac{2}{u}

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

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

\int 3 d u = 3 u

\int \frac{2}{u} d u = 2 ln ∣ u ∣

= \frac{u ^{2}}{2} - 3 u + 2 ln ∣ u ∣

Substitute back

u = x + 1

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

Add a constant to the solution

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

\frac{\partial}{\partial x} (4 y^{3} cos (3 x))

h (x) = e^{x}

x \to \infty lim (1 + 2 x)

n = 1 \sum \infty (n + 1)^{2}

\int 5 e^{x} - 8 cosh (x) d x

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