分解因式:m³-2m²-4m+8
问题描述:
分解因式:m³-2m²-4m+8
答
m³-2m²-4m+8
=m²(m-2)-4(m-2)
=(m-2)(m²-4)
=(m-2)(m+2)(m-2)
=(m+2)(m-2)²