因式分解（m-2n）²+（n+2m）²

因式分解（m-2n）²+（n+2m）²
因式分解（m-2n）²+（n+2m）²

因式分解（m-2n）²+（n+2m）²
（m-2n）²+（n+2m）²
=m²-4mn+4n²+n²+4mn+4m²
=5m²+5n²
=5(m²+n²)

（m-2n）²+（n+2m）
=m^2+4n^2-4mn+n^2+4m^2+4mn
=5(n^2+m^2)