因式分解:x² -xy -2x+2y

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因式分解:x² -xy -2x+2y

x² -xy -2x+2y
=x(x-y)-2(x-y)
=(x-2)(x-y)

x²-xy-2x+2y=x﹙x-y﹚-2﹙x-y﹚=﹙x-y﹚﹙x-2﹚.

x² -xy -2x+2y
=x(x-y)-2(x-y)
=(x-2)(x-y)