Question

Упростить пример. 12334781818288282

Answer 1

$\frac{a+4}{(a-3)^{2} } * \frac{2a-6}{a^{2}-16 } -\frac{2}{a-4}=\frac{a+4}{(a-3)^{2} } *\frac{2(a-3)}{(a-4)(a+4)} -\frac{2}{a-4} =\frac{1}{a-3} *\frac{2}{a-4} -\frac{2}{a-4} =\frac{2}{(a-3)(a-4)} -\frac{2}{a-4} =\frac{2-2(a-3)}{(a-3)*(a-4)} = \frac{2-2a+6}{(a-3)(a-4)} = \frac{8-2a}{(a-3)(a-4)} = \frac{-2+8}{(a-3)(a-4)} = \frac{-2(a-4)}{(a-3)(a-4)} = \frac{-2}{a-3} =-\frac{2}{a-3}$