Question 478444
Width=w
Length=l

w = l-2 ………….(1)

Area of rectangle (A) = 3 

A= l * w
Put the values of ‘w’ and ‘A’ in above equation.

3= l * (l – 2)
3=l^2-2l
l^2-2l-3=0
l^2-3l+l-3=0
l(l-3)+1(l-3)=0
(l+1)(l-3)=0
l+1=0 or l-3=0
l=-1 or l=3
Length cannot be negative 
Therefore    l=3 ft
Put the value of l in equation (1)
w = l-2
w =3-2
w=1 ft