A rectangular parking lot has a length that is 6 yards greater than the width.the area is 160 yards. What's the width
Area = W * L
160 = W ( W + 6) simplify
!60 = W^2 + 6W rearrange as
W^2 + 6W - 160 = 0 factor
(W + 16) ( W - 10) = 0
Only the second factor produces what we want W - 10 = 0 ⇒ W = 10 yards
