Question

I) (a+b)= a²- b²
II)(a+b).(a-b)= a² -b²
III)(a+b)² -2a²= a² -b²
Iv)(a+b).(a-b)= a² -2b²

Answer 1

correta => II)(a+b).(a-b)= a² -b² ✓

as outras => são fakes.