Question

Умоляю помогите!!!
[tex] frac{3}{a-3} - frac{a+15}{a {2} -9} - frac{2}{a} = [/tex

Answer 1

$frac{3}{a-3} - frac{a+15}{a^{2} -9} - frac{2}{a} =frac{3(a+3)}{a^2-9} - frac{a+15}{a^{2} -9} - frac{2}{a} = \ =frac{2(a-3)}{(a-3)(a+3)}- frac{2}{a} = frac{2}{a+3}- frac{2}{a} = frac{2a-2(a+3)}{a+3}= frac{2a-2a-6}{a+3}=- frac{6}{a+3}$