计算(2m²-n)²(2m²+n)²（要有过程）!
问题描述：
计算(2m²-n)²(2m²+n)²（要有过程）!
答
(2m²-n)²(2m²+n)²
=[(2m²-n)(2m²+n)]²
=[(4m⁴-n²)]²
=16m⁸-8m⁴n²+n⁴
答
答：
(2m²-n)²(2m²+n)²
=[(2m²-n)(2m²+n)]²
=(4m^4-n²)²
=16m^8-8(m^4)n²+n^4