过年炖大块肉做法大全:mn+m+n+1因式分解

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将此题目,因式分解

mn+m+n+1
=m(n+1)+n+1
=(n+1)(m+1)

=(m+1)(n+1)

mn+m+n+1
=(mn+m)+n+1
=m(n+1)+(n+1)
=(m+1)(n+1)

mn+n+m+1=(mn+n)+(m+1)=n(m+1)+(m+1)=(n+1)(m+1)

解:mn+m+n+1
=m(n+1)+1(n+1)
=(m+1)(n+1)

mn+m+n+1
=(mn+m)+n+1
=m(n+1)+n+1
=(m+1)(n+1)