SOLUTION: The area of a rectangle is 108 cm^2. If the length is 3 cm longer than the width, what is the perimeter?

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Question 1050662: The area of a rectangle is 108 cm^2. If the length is 3 cm longer than the width, what is the perimeter?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
For a rectangle,
A=L%2AW=108
and,
L=3%2BW
Substituting,
%283%2BW%29W=108
W%5E2%2B3W=108
W%5E2%2B3W-108=0
%28W%2B12%29%28W-9%29=0
Two solutions but only one is positive.
W-9=0
W=9cm
So then,
L=108%2F9
L=12cm