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

The integral of (2x-3)(2x+3) is (4x^3)/3-9x+C

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

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

\frac{4 x ^{3}}{3} - 9 x + C

Solution steps

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

Expand

(2 x - 3) (2 x + 3) : 4 x^{2} - 9

= \int 4 x^{2} - 9 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 4 x^{2} d x - \int 9 d x

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

\int 9 d x = 9 x

= \frac{4 x ^{3}}{3} - 9 x

Add a constant to the solution

= \frac{4 x ^{3}}{3} - 9 x + C

What is the integral of (2x-3)(2x+3) ?
The integral of (2x-3)(2x+3) is (4x^3)/3-9x+C