What is the integral of (x+4)/(x^2+8x+sqrt(5)) ?

The integral of (x+4)/(x^2+8x+sqrt(5)) is 1/2 ln|x^2+8x+sqrt(5)|+C

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

integral of (x+4)/(x^2+8x+sqrt(5))

\int \frac{x + 4}{x ^{2} + 8 x + 5} d x

\frac{1}{2} ln x^{2} + 8 x + 5 + C

Solution steps

\int \frac{x + 4}{x ^{2} + 8 x + 5} d x

Apply u-substitution

= \int \frac{1}{2 u} 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 \frac{1}{u} d u

Use the common integral:

\int \frac{1}{u} d u = ln (∣ u ∣)

= \frac{1}{2} ln ∣ u ∣

Substitute back

u = x^{2} + 8 x + 5

= \frac{1}{2} ln x^{2} + 8 x + 5

Add a constant to the solution

= \frac{1}{2} ln x^{2} + 8 x + 5 + C

What is the integral of (x+4)/(x^2+8x+sqrt(5)) ?
The integral of (x+4)/(x^2+8x+sqrt(5)) is 1/2 ln|x^2+8x+sqrt(5)|+C