Question

Упростить выражение.

Answer 1

a-5/a^2+3a   -    a+5/a^2-3a

Answer 2

(a-3)(a-5)-(a+5)(a+3)/a(a-3)(a+3)=(a2-5a-3a+15)-(a2+3a+5a+15)/a(a-3)(a+3)=
a2-5a-3a+15-a2-3a-5a-15/a(a-3)(a+3)= -16/a(a-3)(a+3)