Раскройте скобки: \( -6\cdot(m+n\,)^2=\)?\( m^{\,2}\) ?\( mn\) ?\( n^{\,2}\)

Задание

Раскройте скобки:

\(\displaystyle -6\cdot(m+n\,)^2=\)[?||-][ ]\(\displaystyle m^{\,2}\) [?|+|-][ ]\(\displaystyle mn\) [?|+|-][ ]\(\displaystyle n^{\,2}\)