因式分解:4m^2-9n^2-4m+1
问题描述:
因式分解:4m^2-9n^2-4m+1
答
(2m+1-3n)(2m+1+3n)
答
4m^2-9n^2-4m+1=4m^2-4m+1-9n^2=(2m-1)^2-9n^2=(2m+1-3n)(2m+1+3n)