What is the integral from 0 to 2 of (6x-3)(8x^2+2) ?

The integral from 0 to 2 of (6x-3)(8x^2+2) is 140

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integral from 0 to 2 of (6x-3)(8x^2+2)

\int_{0}^{2} (6 x - 3) (8 x^{2} + 2) d x

140

Solution steps

\int_{0}^{2} (6 x - 3) (8 x^{2} + 2) d x

Expand

(6 x - 3) (8 x^{2} + 2) : 48 x^{3} + 12 x - 24 x^{2} - 6

= \int_{0}^{2} 48 x^{3} + 12 x - 24 x^{2} - 6 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_{0}^{2} 48 x^{3} d x + \int_{0}^{2} 12 x d x - \int_{0}^{2} 24 x^{2} d x - \int_{0}^{2} 6 d x

\int_{0}^{2} 48 x^{3} d x = 192

\int_{0}^{2} 12 x d x = 24

\int_{0}^{2} 24 x^{2} d x = 64

\int_{0}^{2} 6 d x = 12

= 192 + 24 - 64 - 12

Simplify

= 140

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What is the integral from 0 to 2 of (6x-3)(8x^2+2) ?
The integral from 0 to 2 of (6x-3)(8x^2+2) is 140