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December 21, 2014

December 21, 2014

Posted by **donald** on Friday, September 23, 2011 at 10:37pm.

- algebra2 -
**Reiny**, Saturday, September 24, 2011 at 8:16amfactor always come in pairs

so

x^2 + 16x + 63

= (x+7)(x+9)

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