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

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

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

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

\frac{1}{2} ln x^{2} + 4 x + 5 + C

Solution steps

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

Apply u-substitution

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

= \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} + 4 x + 5

= \frac{1}{2} ln x^{2} + 4 x + 5

Add a constant to the solution

= \frac{1}{2} ln x^{2} + 4 x + 5 + C

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