Question

a^2-b^2-4b-4a помогитеее

Answer 1

а²-в²-4в-4а=(а+в)(а-в)-4(в+а)=(а+в)(а-в-4)

Answer 2

(a²-b²)-4(a+b)=(a-b)(a+b)-4(a+b)=(a+b)(a-b-4)

Answer 3

ЛОЛ

Answer 4

??