Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle and label its height and width. (Do this on paper. Your instructor may ask you to turn in this graph.)
This is the solution I got, but it was marked wrong:
x^2-2x = x+4
(x+1)(x-4), bounds are (-1,4)
= (int from -1 and 4) x^2-3x-4
your integrand is incorrect ... should be top function - bottom function.