因式分解x2+y-xy-x

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因式分解x2+y-xy-x
因式分解x2+y-xy-x

因式分解x2+y-xy-x
x²+y-xy-x=﹙x²-xy﹚+﹙y-x﹚
=x﹙x-y﹚-﹙x-y﹚
=﹙x-y﹚﹙x-1﹚

x²+y-xy-x =x²-xy-x+y=x(x-y)-(x-y)=(x-1)(x-y)

x2+y-xy-x
=x(x-y)-(x-y)
=(x-y)(x-1)

x(x-1)+y(1-x)
(x-y)(x-1)

原式=x(x-1)+y(x-1)=(x-1)(x-y)

(x-1)(x-y)