Раскройте скобки: \( 7\cdot(v-k\,)^2=\)?\( v^{\,2}\) ?\( vk\) ?\( k^{\,2}\)

Задание

Раскройте скобки:

\(\displaystyle 7\cdot(v-k\,)^2=\)[?||-][ ]\(\displaystyle v^{\,2}\) [?|+|-][ ]\(\displaystyle vk\) [?|+|-][ ]\(\displaystyle k^{\,2}\)