Question

Помогите решить пример, пожалуйста (СРОЧНО)

Answer 1

$\frac{n^2-5n}{n^2-10n+25}+\frac{25}{n^2-25}=\frac{n(n-5)}{(n-5)^2}+\frac{25}{(n-5)(n+5)}=\frac{n}{n-5}+\frac{25}{(n-5)(n+5)}=\\\\=\frac{n(n+5)+25}{(n-5)(n+5)}=\frac{n^2+5n+25}{(n-5)(n+5)}=\frac{n^2+5n+25}{n^2-25}$