(x-y)^2-3(x-y+6)因式分解

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(x-y)^2-3(x-y+6)因式分解(x-y)^2-3(x-y+6)因式分解(x-y)^2-3(x-y+6)因式分解(x-y)^2-3(x-y+6)=﹙x-y﹚²-3﹙x-y﹚-18=﹙

(x-y)^2-3(x-y+6)因式分解
(x-y)^2-3(x-y+6)因式分解

(x-y)^2-3(x-y+6)因式分解
(x-y)^2-3(x-y+6)
=﹙x-y﹚²-3﹙x-y﹚-18
=﹙x-y-6﹚﹙x-y+3﹚.