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

The integral of (x^3-x^2+x)/(x^2+x-2) is (x^2)/2-2x+1/3 ln|x-1|+14/3 ln|x+2|+C

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

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

\frac{x ^{2}}{2} - 2 x + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{14}{3} ln ∣ x + 2 ∣ + C

Solution steps

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

Expand

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

\int \frac{x ^{3}}{x ^{2} + x - 2} d x = \frac{x ^{2}}{2} - x + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{8}{3} ln ∣ x + 2 ∣

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

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

= \frac{x ^{2}}{2} - x + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{8}{3} ln ∣ x + 2 ∣ - (x + \frac{1}{3} ln ∣ x - 1 ∣ - \frac{4}{3} ln ∣ x + 2 ∣) + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{2}{3} ln ∣ x + 2 ∣

Simplify

\frac{x ^{2}}{2} - x + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{8}{3} ln ∣ x + 2 ∣ - (x + \frac{1}{3} ln ∣ x - 1 ∣ - \frac{4}{3} ln ∣ x + 2 ∣) + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{2}{3} ln ∣ x + 2 ∣ : \frac{x ^{2}}{2} - 2 x + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{14}{3} ln ∣ x + 2 ∣

= \frac{x ^{2}}{2} - 2 x + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{14}{3} ln ∣ x + 2 ∣

Add a constant to the solution

= \frac{x ^{2}}{2} - 2 x + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{14}{3} ln ∣ x + 2 ∣ + C

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What is the integral of (x^3-x^2+x)/(x^2+x-2) ?
The integral of (x^3-x^2+x)/(x^2+x-2) is (x^2)/2-2x+1/3 ln|x-1|+14/3 ln|x+2|+C