Question

Напишіть розв'язання

Answer 1

Пошаговое объяснение:

$\frac{x - 3}{x {}^{2} - 9} - \frac{6}{x {}^{2} - 9 } =\frac{x-3}{\left(x-3\right)\left(x+3\right)}-\frac{6}{x^{2}-9} =\frac{1}{x+3}-\frac{6}{x^{2}-9} =\frac{1}{x+3}-\frac{6}{\left(x-3\right)\left(x+3\right)} =\frac{x-3}{\left(x-3\right)\left(x+3\right)}-\frac{6}{\left(x-3\right)\left(x+3\right)} =\frac{x-3-6}{\left(x-3\right)\left(x+3\right)} =\frac{x-9}{\left(x-3\right)\left(x+3\right)} =\frac{x-9}{x^{2}-9}$