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)(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)