Question

$\frac{ {a}^{2} }{ {a }^{2} - 25} - \frac{a}{a + 5}$
выполните действия

Answer 1

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