Question 973594
width=x 
length=x+8  Units in meters; area in sq meters
A=105=x(x+8)

x^2+8x=105
x2+8x-105=0

(x+15)(x-7)=0
x= -15, 7
The width must be positive, so the width is 7m
Length is 7+8=15m
Area is 105 m^2.