Question

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

Answer 1

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