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January 28, 2015

January 28, 2015

Posted by **Maria** on Friday, July 24, 2009 at 11:53pm.

a^2 -121 = 0

- algebra -
**DrBob222**, Saturday, July 25, 2009 at 12:44am(a+11)(a-11) = 0

a = -11

a = +11

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