Реши :7y(x+y-p)-7p(x-y-p)+7x(x-y+p)

Question

Реши :7y(x+y-p)-7p(x-y-p)+7x(x-y+p)

Answer 1

7xy+7y2-7py-7px+7py+7p2+7x2-7xy+7px=7y2+7p2+7x2

Comments

7y2, 7p2, 7x2, 2-квадрат