xy+2x+y+2因式分解

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

xy+2x+y+2因式分解
xy+2x+y+2因式分解

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

xy+2x+y+2=x(y+2)+(y+2)=(x+1)(y+2)

原式=x（y+2）+（y+2）
=（y+2）（x+1）

xy+2x+y+2=y(x+1)+2(x+1)=(x+1)(y+2)

等于（xy+y）+(2x+2)=(x+1)y+2(x+1)=(x+1)(y+2)

X﹙Y+2﹚+Y+2＝﹙X+1﹚（Y+2）

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