The length of a rectangle is 7 centimeters less than its width. What are the dimensions of the rectangle if its area is 120 square​ centimeters?

Answer 1

Let L=length and W= width

L=W-7

Area = LW = (W-7)W = 120

W² -7W -120 = 0

This factors easily: (W-15)(W+8)=0

You finish it from here!