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January 29, 2015

January 29, 2015

Posted by **jane** on Thursday, November 10, 2011 at 10:56am.

If the sides of a square are lingthened by 7cm, the area becomes 169cm^2. Fine thelength of a side of the orginal square.

- algebra -
**Steve**, Thursday, November 10, 2011 at 11:14amIf the original side is s,

(s+7)^2 = 169 = 13^2

s+7 = 13

s = 6

s = -20 also satisfies the original equation, but does not fit the real world.

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