Question

Упростите выражение !!!!!!!

Answer 1

B/(a + b) : (1/(a - b) + 1/(a + b)) = b/(a + b) :(a + b + a - b)/(a + b)(a - b) = b/(a + b) : 2a/(a + b)(a - b)  = b/(a + b) * (a + b)(a - b)/2a = b(a - b)/2a
4.3*(-2.7 - 4.3)/-2.7*2 = 4.3*7/5.4 = 301/54 = 5 31/54