因式分解x+y+xy+1如题

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因式分解x+y+xy+1如题因式分解x+y+xy+1如题因式分解x+y+xy+1如题x+y+xy+1=x(1+y)+(y+1)=(x+1)(y+1)x+y+xy+1=(x+xy)+(y+1)=x(y+

因式分解x+y+xy+1如题
因式分解x+y+xy+1
如题

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

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

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