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OpenStudy (anonymous):
If the sides of a square are lengthened by 7 cm , the area becomes 121 cm, find the length of a side of the original square. The length of a side of the original square is--------cm. I can figure out the solution if i know what the correct equation is.
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OpenStudy (anonymous):
(x+7)^2=121 ===> x+7=11 ===> x=4
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