一道因式分解题,急xyz+xy+yz+zx+x+y+z+1

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一道因式分解题,急xyz+xy+yz+zx+x+y+z+1一道因式分解题,急xyz+xy+yz+zx+x+y+z+1一道因式分解题,急xyz+xy+yz+zx+x+y+z+1xyz+xy+yz+zx+

一道因式分解题,急xyz+xy+yz+zx+x+y+z+1
一道因式分解题,急
xyz+xy+yz+zx+x+y+z+1

一道因式分解题,急xyz+xy+yz+zx+x+y+z+1
xyz+xy+yz+zx+x+y+z+1
=xyz+xy+yz+y+xz+x+z+1
=xy(z+1)+y(z+1)+x(z+1)+(z+1)
=(z+1)(xy+y+x+1)
=(z+1)(x+1)(y+1)

xyz+yz+zx+xy+x+y+z+1
=z(xy+y+x)+(xy+x+y)+(z+1)
=(xy+x+y)(z+1)+(z+1)
=(z+1)(xy+x+y+1)
=(z+1)[x(y+1)+(y+1)]
=(z+1)(x+1)(y+1)

(xy+x+y+1)(z+1)或者(yz+y+z+1)(x+1)或者(xz+z+x+1)(y+1)

(x+1)(y+1)(z+1)

原式=X(YZ+Y+Z)+(YZ+Y+Z+1)
=(X+1)(YZ+Y+Z+1)
=(X+1)(Y+1)(Z+1)