第1个回答 2013-03-03
x^3 - 1
= x^3 + x^2 + x - x^2 - x - 1
= x(x^2 + x + 1) - (x^2 + x + 1)
= (x - 1)(x^2 + x + 1)本回答被提问者采纳
= x^3 + x^2 + x - x^2 - x - 1
= x(x^2 + x + 1) - (x^2 + x + 1)
= (x - 1)(x^2 + x + 1)本回答被提问者采纳
X的三次方减一【要求因式分解的增项方法】详细过程
= x^3 + x^2 + x - x^2 - x - 1 = x(x^2 + x + 1) - (x^2 + x + 1)= (x - 1)(x^2 + x + 1)
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