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posted by ki on Saturday, March 23, 2013 at 6:33pm.

x squared - 9 factor

x^2 - 9 Difference of squares (x+y)(x-y) = x^2-y^2 x^2 = x^2 y^2 = 3^2 So, we get (x+3)(x-3) as the answer.

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