Answer:
Step-by-step explanation:
width = x
length = x + 4
Area = l * w = 60
Area = x * (x + 4) = 60
x^2 + 4x - 60 = 0
(x - 6)(x + 10) = 0
x - 6 = 0 is the only valid answer. Nothing can be minus in this question.
x - 6 = 0
x = 6
So the width is 6
The length = 6 + 4 = 10
