Question

Упростите выражение.
a/a+b - b/b-a - 2ab/a^2-b^2

Answer 1

a/(a + b) + b/(a - b) -2ab/(a - b)(a + b)=(a(a - b) + b(a + b) -2ab))/(а - b)(a + b)=
=(a² - ab + ab +b² - 2ab)/(a - b)(a + b)= (a - b)²/(a - b)(a + b)= (a - b)/(a + b)