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posted by Bryanne Monday, November 8, 2010 at 3:09pm.

what is c squared minus 6cd plus 9d squared minus 4

write it this way: c^2 - 6cd + 9d^2 - 4 = (c - 3d)^2 - 4 now I see a difference of squares = (c-3d + 2)(c-3d-2)

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