x^3-1因式分解,

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x^3-1因式分解,x^3-1因式分解,x^3-1因式分解,x^3-x^2+x^2-x+x-1=x^2(x-1)+x(x-1)+(x-1)=(x-1)(x^2+x+1)

x^3-1因式分解,
x^3-1因式分解,

x^3-1因式分解,
x^3-x^2 +x^2-x +x-1
=x^2(x-1)+x(x-1)+(x-1)
=(x-1)(x^2+x+1)