因式分解:4m^2-n^2-1+2n
问题描述:
因式分解:4m^2-n^2-1+2n
答
4m^2-n^2-1+2n
=4m^2-(n^2+1-2n)
=4m^2-(n-1)^2
=(2m+n-1)(2m-n+1)