Is this correct
The width of a rectangle is 8 feet less than the length. If the area is 20 square feet, find the length and the width.
Let w = width, then w+8 = length
Area = 20
L * W = 20
(w+8)*w = 20
w^2 +8w = 20 Set equal to zero.
w^2 + 8w - 20 = 0 Factor -->
(w+10)(w-2) = 0 Set each factor equal to zero -->
w + 10 = 0 --> w = -10 Discard because lengths must be positive.
w - 2 = 0 --> w = 2