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

The integral of (2x^3+3)^2 is (4x^7)/7+3x^4+9x+C

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

\int (2 x^{3} + 3)^{2} d x

\frac{4 x ^{7}}{7} + 3 x^{4} + 9 x + C

Solution steps

\int (2 x^{3} + 3)^{2} d x

Expand

(2 x^{3} + 3)^{2} : 4 x^{6} + 12 x^{3} + 9

= \int 4 x^{6} + 12 x^{3} + 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^{6} d x + \int 12 x^{3} d x + \int 9 d x

\int 4 x^{6} d x = \frac{4 x ^{7}}{7}

\int 12 x^{3} d x = 3 x^{4}

\int 9 d x = 9 x

= \frac{4 x ^{7}}{7} + 3 x^{4} + 9 x

Add a constant to the solution

= \frac{4 x ^{7}}{7} + 3 x^{4} + 9 x + C

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What is the integral of (2x^3+3)^2 ?
The integral of (2x^3+3)^2 is (4x^7)/7+3x^4+9x+C