Problema Solution
The length of a rectangular frame is 4 cm more than the width. The area of the frame is 77 square cm. Find the width.
Answer provided by our tutors
LW = 77, (4+w)*w = 77 ===> w^2+4-77 = 0 ==> (w+11)(w-7) = 0, w= -11, 7 since a diwth cannot be negative, that leaves width = 7, L = w+4, L = 11