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