The problem asks: Estimate the area under the graph of f(x0 = 4x^2 + 4x + 4 from x=5 to x= 8.

using 3 approximating rectangles and right endpoints.

R3=?

Using 3 approximating rectangles and left endpoints.

L3=?

I under stand up to here:

4x^3/3-2x^2-4x

I know I am supposed to evaluate from 5 to 8 but that is as far as it goes.

How about a push.

Thank You,

Keith