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December 21, 2014

December 21, 2014

Posted by **Lee** on Monday, October 25, 2010 at 6:04pm.

- college algebra -
**Reiny**, Monday, October 25, 2010 at 6:43pmlooks like a simple difference of squares to me

hint: 256 = 16^2 and 81 = 9^2

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