What is the integral of (3x+3)/(x^2+x-2) ?

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

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integral of (3x+3)/(x^2+x-2)

\int \frac{3 x + 3}{x ^{2} + x - 2} d x

ln ∣ x - 1 ∣ + 2 ln ∣ x + 2 ∣ - ln \frac{4}{3} + \frac{2}{3} x + ln - \frac{2}{3} + \frac{2}{3} x + C

Solution steps

\int \frac{3 x + 3}{x ^{2} + x - 2} d x

Expand

\frac{3 x + 3}{x ^{2} + x - 2} : \frac{3 x}{x ^{2} + x - 2} + \frac{3}{x ^{2} + x - 2}

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{3 x}{x ^{2} + x - 2} d x + \int \frac{3}{x ^{2} + x - 2} d x

\int \frac{3 x}{x ^{2} + x - 2} d x = ln ∣ x - 1 ∣ + 2 ln ∣ x + 2 ∣

\int \frac{3}{x ^{2} + x - 2} d x = - ln \frac{4}{3} + \frac{2}{3} x + ln - \frac{2}{3} + \frac{2}{3} x

= ln ∣ x - 1 ∣ + 2 ln ∣ x + 2 ∣ - ln \frac{4}{3} + \frac{2}{3} x + ln - \frac{2}{3} + \frac{2}{3} x

Add a constant to the solution

= ln ∣ x - 1 ∣ + 2 ln ∣ x + 2 ∣ - ln \frac{4}{3} + \frac{2}{3} x + ln - \frac{2}{3} + \frac{2}{3} x + C

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