Answers

2014-08-03T18:38:23+08:00
1. x^2 - 2x + 1 = (x - 1)(x - 1) 2. x^2 - 4 = (x - 2)(x +2) 3. x^3 + 3x^2 + 3x + 1 = (x + 1)(x + 1)(x + 1)
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