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

x squared - 9

factor

  • math - , Saturday, March 23, 2013 at 10:05pm

    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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