x2次-xy+2x+y-3因式分解

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

x2次-xy+2x+y-3因式分解
x2次-xy+2x+y-3
因式分解

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

诈一看挺复杂,其实不难哦!原式=x'2-1-xy+y+2x-2=(x-1)(x-y+3) 只要将3拆成2和1就搞定了!