因式分解x²-xy+2x+y-3

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因式分解x²-xy+2x+y-3
因式分解x²-xy+2x+y-3

因式分解x²-xy+2x+y-3
x²-xy+2x+y-3
=(x²+2x-3)-(xy-y)
=(x-1)(x+3)-y(x-1)
=(x-1)(x+3-y)