SOLUTION: The length of the side of a rectangular desk is given by 2x - 7y cm. The length of the front is given by 2x + 7y cm. What is an algebraic expression for the area of the top of the

Question 509747: The length of the side of a rectangular desk is given by 2x - 7y cm. The length of the front is given by 2x + 7y 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 ptaylor(2198) (Show Source): You can put this solution on YOUR website!
Area(A) of a rectangle equals Length(L) times Width(W) or A=L*W
Length of rectangle=(2x-7y)cm
Width of rectangle=(2x+7y)cm
Area of the top=(2x-7y)cm*(2x+7y)cm using FOIL, we get
Area of top=(4x^2+14xy-14xy-49y^2)cm^2
Area of top=(4x^2-49y^2)cm^2
Hope this helps---ptaylor

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