Sketch the region enclosed by the given curves. Decide whether to integrate with respect toxory. 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^2-2x-x-4 =0

x^2-3x-4 =0

(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.