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化简因式x³-7x²+10x 2.x²(x-y)+(y-x)
人气:421 ℃ 时间:2020-02-05 01:54:57
解答
x³-7x²+10x =x(x²-7x+10)=x(x-2)(x-5)
x²(x-y)+(y-x)=x²(x-y)-(x-y)=(x-y)(x²-1)=(x-y)(x+1)(x-1)
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