Question

9/2n-6 -n^2/2n-6 решить

Answer 1

$\frac{9}{2n - 6} - \frac{n {}^{2} }{2n - 6} \\ \\ \frac{9 - n {}^{2} }{2n - 6} \\ \\ \frac{(3 - n) \times (3 + n)}{ - 2( - n + 3)} \\ \\ \frac{ 3 + n}{ - 2} \\ \\ - \frac{ 3 + n}{2}$