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

Question #1

Factor this expression completely
x2 - 9
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  • algebra 10 grade - , Monday, December 7, 2009 at 5:57pm

    Rewrite the expression as
    x²-3²
    and apply the identity:
    (x²-y²)=(x+y)(x-y)

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