What is the integral of (2x-5)(x+3) ?

The integral of (2x-5)(x+3) is (2x^3)/3+(x^2)/2-15x+C

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integral of (2x-5)(x+3)

\int (2 x - 5) (x + 3) d x

\frac{2 x ^{3}}{3} + \frac{x ^{2}}{2} - 15 x + C

Solution steps

\int (2 x - 5) (x + 3) d x

Expand

(2 x - 5) (x + 3) : 2 x^{2} + x - 15

= \int 2 x^{2} + x - 15 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 2 x^{2} d x + \int x d x - \int 15 d x

\int 2 x^{2} d x = \frac{2 x ^{3}}{3}

\int x d x = \frac{x ^{2}}{2}

\int 15 d x = 15 x

= \frac{2 x ^{3}}{3} + \frac{x ^{2}}{2} - 15 x

Add a constant to the solution

= \frac{2 x ^{3}}{3} + \frac{x ^{2}}{2} - 15 x + C

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What is the integral of (2x-5)(x+3) ?
The integral of (2x-5)(x+3) is (2x^3)/3+(x^2)/2-15x+C