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