Question

Помогите надо УПРОСТИТЬ ПРИМЕР!!!

Answer 1

$......=\frac{a+4}{(a-3)(a-3)} *\frac{2(a-3)}{(a-4)(a+4)}- \frac{2}{a-4} =\frac{2}{(a-3)(a-4)} -\frac{2}{a-4} =\\ \\ \frac{2-2(a-3)}{(a-3)(a-4)} =\frac{2-2a+6}{(a-3)(a-4)} =\frac{8-2a}{(a-3)(a-4)} =\frac{2(4-a)}{(a-3)(a-4)} =\frac{-2(a-4)}{(a-3)(a-4)} =-\frac{2}{a-3}$