Use double integral to find the area bounded by the equation:

y= x(x-2)(x+1) , y=0

I have attempted it by doing the following:

For x fixed, y varies from y= x(x-2)(x+1) to y=0

x varies from x=2 to x=-1

But while solving the integral i'm not reaching the required answer.

Can anyone help me out please?

I have exams this Friday!

Thanks bunches