What is the integral of (x+4)/(x^2+2x+1) ?

The integral of (x+4)/(x^2+2x+1) is ln|x+1|-3/(x+1)+C

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integral of (x+4)/(x^2+2x+1)

\int \frac{x + 4}{x ^{2} + 2 x + 1} d x

ln ∣ x + 1 ∣ - \frac{3}{x + 1} + C

Solution steps

\int \frac{x + 4}{x ^{2} + 2 x + 1} d x

Expand

\frac{x + 4}{x ^{2} + 2 x + 1} : \frac{x}{x ^{2} + 2 x + 1} + \frac{4}{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{x}{x ^{2} + 2 x + 1} d x + \int \frac{4}{x ^{2} + 2 x + 1} d x

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

\int \frac{4}{x ^{2} + 2 x + 1} d x = - \frac{4}{x + 1}

= ln ∣ x + 1 ∣ + \frac{1}{x + 1} - \frac{4}{x + 1}

Simplify

ln ∣ x + 1 ∣ + \frac{1}{x + 1} - \frac{4}{x + 1} : ln ∣ x + 1 ∣ - \frac{3}{x + 1}

= ln ∣ x + 1 ∣ - \frac{3}{x + 1}

Add a constant to the solution

= ln ∣ x + 1 ∣ - \frac{3}{x + 1} + C

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What is the integral of (x+4)/(x^2+2x+1) ?
The integral of (x+4)/(x^2+2x+1) is ln|x+1|-3/(x+1)+C