What is the integral of 1/((x+6)(x-2)) ?

The integral of 1/((x+6)(x-2)) is -1/8 ln|x+6|+1/8 ln|x-2|+C

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integral of 1/((x+6)(x-2))

\int \frac{1}{( x + 6 ) ( x - 2 )} d x

- \frac{1}{8} ln ∣ x + 6 ∣ + \frac{1}{8} ln ∣ x - 2 ∣ + C

Solution steps

\int \frac{1}{( x + 6 ) ( x - 2 )} d x

Take the partial fraction of

\frac{1}{( x + 6 ) ( x - 2 )} : - \frac{1}{8 ( x + 6 )} + \frac{1}{8 ( x - 2 )}

= \int - \frac{1}{8 ( x + 6 )} + \frac{1}{8 ( x - 2 )} d x

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}{8 ( x + 6 )} d x + \int \frac{1}{8 ( x - 2 )} d x

\int \frac{1}{8 ( x + 6 )} d x = \frac{1}{8} ln ∣ x + 6 ∣

\int \frac{1}{8 ( x - 2 )} d x = \frac{1}{8} ln ∣ x - 2 ∣

= - \frac{1}{8} ln ∣ x + 6 ∣ + \frac{1}{8} ln ∣ x - 2 ∣

Add a constant to the solution

= - \frac{1}{8} ln ∣ x + 6 ∣ + \frac{1}{8} ln ∣ x - 2 ∣ + C

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What is the integral of 1/((x+6)(x-2)) ?
The integral of 1/((x+6)(x-2)) is -1/8 ln|x+6|+1/8 ln|x-2|+C