The area of a rectangle is 20 cm The length is 8 more than the width. Find the width in cm.
Area = L * W
20 = L * W
And L = W + 8
So this implies that
20 = (W + 8) * W simplify
W^2 + 8W = 20
W^2 + 8W - 20 = 0 factor
(W - 2) ( W + 10) = 0
Only the first factor set to 0 gives us a positive result
W - 2 = 0
W = 2 cm
