Posted by
**Tony** on
.

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.

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