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September 18, 2014

September 18, 2014

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

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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