SOLUTION: The area of a rectangle is 40 in.2. If the length is x+4in. and the width is x-2., what are the dimensions of the rectangle?

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Question 103176: The area of a rectangle is 40 in.2. If the length is x+4in. and the width is x-2., what are the dimensions of the rectangle?
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
x+4
x-2
---------------
x^2+4x-2x-8
x^2+2x-8=40
x^2+2x-8-48=0
x^2+2x-48=0
(x+8)(x-6)=0
x-6=0
x=6
6+4=10 answer for the length.
6-2=4 for the width.
proof.
4*10=40