Homework Help: Algebra

Posted by Tony on Wednesday, April 11, 2007 at 10:50pm.

If the sides of of a square are decreased by 2cm, the area is decreased by 36cm square. What are the dimensions of the original square?

original square: x by x
new square: x-2 by x-2

old area = x^2
new area = (x-2)^2

The difference in these area = 36
difference means subtract.

take it from there.

10

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