计算(m^2+mn+n^2)(m^2-mn+n^2)

问题描述:

计算(m^2+mn+n^2)(m^2-mn+n^2)

(m^2+mn+n^2)(m^2-mn+n^2)
=(m²+n²)²-(mn)²
=m^4+2m²n²+n^4-m²n²
=m^4+m²n²+n^4