What is the integral of 1/((x+2)(x-5)) ?

The integral of 1/((x+2)(x-5)) is -1/7 ln|x+2|+1/7 ln|x-5|+C

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integral of 1/((x+2)(x-5))

\int \frac{1}{( x + 2 ) ( x - 5 )} d x

- \frac{1}{7} ln ∣ x + 2 ∣ + \frac{1}{7} ln ∣ x - 5 ∣ + C

Solution steps

\int \frac{1}{( x + 2 ) ( x - 5 )} d x

Take the partial fraction of

\frac{1}{( x + 2 ) ( x - 5 )} : - \frac{1}{7 ( x + 2 )} + \frac{1}{7 ( x - 5 )}

= \int - \frac{1}{7 ( x + 2 )} + \frac{1}{7 ( x - 5 )} 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}{7 ( x + 2 )} d x + \int \frac{1}{7 ( x - 5 )} d x

\int \frac{1}{7 ( x + 2 )} d x = \frac{1}{7} ln ∣ x + 2 ∣

\int \frac{1}{7 ( x - 5 )} d x = \frac{1}{7} ln ∣ x - 5 ∣

= - \frac{1}{7} ln ∣ x + 2 ∣ + \frac{1}{7} ln ∣ x - 5 ∣

Add a constant to the solution

= - \frac{1}{7} ln ∣ x + 2 ∣ + \frac{1}{7} ln ∣ x - 5 ∣ + C

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

n = 1 \sum \infty \frac{2 n}{3 n + 1}

2 x^{2} \frac{d y}{d x} = 3 x y + y^{2}

\frac{d}{d t} (cos (t) - t sin (t))

What is the integral of 1/((x+2)(x-5)) ?
The integral of 1/((x+2)(x-5)) is -1/7 ln|x+2|+1/7 ln|x-5|+C