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January 31, 2015

January 31, 2015

Posted by **lola** on Sunday, February 21, 2010 at 2:12pm.

i know its A2 – b2 = (a-b)(a+b) but i cant figure it out

- math -
**lola**, Sunday, February 21, 2010 at 2:26pmhelpppppppp

- math -
**PsyDAG**, Monday, February 22, 2010 at 8:07amWhen writing online, x^2 = x squared.

(9y^2 - 4)(9y^2 + 4) = (3y - 2)(3y + 2)(9y^2 + 4)

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