The length of a rectangle is the sum of the width and 4. The area of the rectangle is 32 units. What is the width, in units, of the rectangle?

Answer 1

L=W+4

Area = 32 = LW = (W+4)W = W^2 + 4W

W^2 + 4W - 32=0

(W+8)(W-4) =0

W = 4 (ignore the negative solution)

L = 4+4 = 8