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September 18, 2014

September 18, 2014

Posted by **Anonymous** on Monday, December 7, 2009 at 5:26pm.

Factor this expression completely

x2 - 9

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- algebra 10 grade -
**MathMate**, Monday, December 7, 2009 at 5:57pmRewrite the expression as

x²-3²

and apply the identity:

(x²-y²)=(x+y)(x-y)

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