Question 548536
width = w
length = w+3

Area = L*W

w(w+3)=418

w^2+3w=418
w^2+3w-418=0
w^2+22w-19w-416=0
w(w+22)-19(w+22)=0
(w+22)(w-19)=0

w=19 inches which is positive
Length = 19+3=22 inches