Question 529682
What is the length and width of the rectangle 
The area of the rectangle is 84 sq. in. Find its length and width. 
The top of the rectangle is x+3 and the side is x-2
**
let width=x-2
let length=x+3
Area = length*width
(x-2)(x+3)=84
FOIL
x^2+x-6=84
x^2+x-6-84=0
x^2+x-90=0
(x+10)(x-9)=0
x=-10 (reject, length & width>0
or
x=9
x-2=7
x+3=12
ans:
width=7
length=12