x3-x2-x因式分解要过程，。！！

Question

如题所述

Answer 1

x^3-x^2-x
=x(x^2-x-1)

附：
x^2-x-1
=(x^2-x+1/4-1/4-1)
=(x-1/2)^2-5/4
=(x-1/2)^2-(√5/2)^2
=(x-1/2+√5/2)(x-1/2-√5/2)

Answer 2

追答

。。。

Answer 3

啊，等图片追答

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