Posted by justin on Tuesday, April 20, 2010 at 5:36pm.
(x-7)^3
= (x-7)(x-7)(x-7)
= (x-7)(x^2 - 14x + 49)
= x^3 - 14x^2 + 49x - 7x^2 + 98x - 343
= x^3 - 21x^2 + 147x - 343
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