- #1

- 95

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## Homework Statement

dz/dx=(3x

^{2}+x)(2x^3+x^2)^2[/B]

## Homework Equations

∫(3x^2+x)(2x^3+x^2)^2 dx

## The Attempt at a Solution

I tried substituting (2x^3+x^2)

Let t= 2x^3 + x^2

dt=6x^2+2x dx

dt/dx= 6x^2+2x

I can only solve till this point . I don't have any clue how to solve it further

But how do we get 1/2 ∫u^2 du ?? I don't understand it at all