
1个回答
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=x³-x²-2x²+2x+x-1
=x²(x-1)-2x(x-1)+(x-1)
=(x-1)(x²-2x+1)
=(x-1)(x²-x-x+1)
=(x-1)【x(x-1)-(x-1)】
=(x-1)(x-1)(x-1)
=(x-1)³
=x²(x-1)-2x(x-1)+(x-1)
=(x-1)(x²-2x+1)
=(x-1)(x²-x-x+1)
=(x-1)【x(x-1)-(x-1)】
=(x-1)(x-1)(x-1)
=(x-1)³
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