(x-y)³+9(x-y)-6(x-y)²

(x-y)³+9(x-y)-6(x-y)²
(x-y)³+9(x-y)-6(x-y)²

(x-y)³+9(x-y)-6(x-y)²
原式=(x-y)[(x-y)^2-6(x-y)+9]
=(x-y)(x-y-3)^2
很高兴为您解答,祝你学习进步!不懂可追问!

原式=(x-y)[(x-y)²+9-6(x-y)]
=(x-y)[(x-y)-3]²
=(x-y)(x-y-3)²
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