X²-X+1=0,求X³-3

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X²-X+1=0,求X³-3X²-X+1=0,求X³-3X²-X+1=0,求X³-3x^3-3=x^3+1-4=(x+1)(X²-

X²-X+1=0,求X³-3
X²-X+1=0,求X³-3

X²-X+1=0,求X³-3
x^3-3=x^3+1-4=(x+1)(X²-X+1)-4=-4