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x^3-2x^2-x+2
=x^3-x^2-x^2-x+2
=x^2(x-1)-(x^2+x-2)
=x^2(x-1)-(x-1)(x+2)
=(x-1)(x^2-x-2)
=(x-1)(x+1)(x-2)
=x^3-x^2-x^2-x+2
=x^2(x-1)-(x^2+x-2)
=x^2(x-1)-(x-1)(x+2)
=(x-1)(x^2-x-2)
=(x-1)(x+1)(x-2)
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展开全部
x^3-2x^2-x+2 ?
=x²(x-2)-(x-2)
=(x-2)(x²-1)
=(x-2)(x+1)(x-1)
=x²(x-2)-(x-2)
=(x-2)(x²-1)
=(x-2)(x+1)(x-1)
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