5 (a+b)(a-b)-(a+b)2 (2-это степень скобки) Помогите)

Question

5 (a+b)(a-b)-(a+b)2
(2-это степень скобки)
Помогите)

Answer 1

4a^2-4b^2+2ab
)))))))))))

Answer 2

4a^2-4b^2+2ab              !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!