Posted by Angie on Thursday, April 30, 2009 at 9:58pm.
Since the formula for the a\area of a square is "Area=(side)^2", all the sides are equal. So just substitute in.
s^2=64
s=sqrootof64
side=8
8-3=5
so the original side length is 5 cm.
The area of a square is the two sides multiplied together.
Since all sides of a square are the same, you need to find the square root of 64.
When you find that, subtract 3 cm from it to answer your question.
the ways above is probably easier, but my teacher probably wants me to solve it by factoring..
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