Question 211672
(15 + 2w)(12 + 2w) = 378


180 + 54w + 4w^2 = 378


4w^2 + 54w - 198 = 0 ___ 2w^2 + 27w - 99 = 0


(2w + 33)(w - 3) = 0


2w + 33 = 0 ___ w = -33/2 ___ negative value not realistic


w - 3 = 0 ___ w = 3