Question

СРОЧНО!!! Выполните действие
2a/a-b+2a/a+b

Answer 1

(2а^2+2ab+2a^2-2ab)/(a^2-b^2)=4a^2/(a^2-b^2)

Answer 2

2a/(a-b) +2a/(a+b)=[2a(a+b)+2a(a-b)]/(a²-b²)=2a(a+b+a-b)/(a²-b²)=2a*2a/(a²-b²)=
=4a²/(a²-b²)