SOLUTION: I am having trouble setting up this problem and solving it... The length of the side of a rectangular desk is given by 3x-y cm. The length of the front is given by 3x+y cm.

Question 401844: I am having trouble setting up this problem and solving it...
The length of the side of a rectangular desk is given by 3x-y cm. The length of the front is given by 3x+y cm. What is an algebraic expression for the area of the top of the rectangular desk? Include correct units as part of your answer.
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
3x+y
3x-y multiply.
--------------
9x^2+3xy-3xy-y^2
(9x^2-y^2) cm^2 ans.
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