Question

Выполните деление a^2+3a+3(a+3)/a^2-9 : (1+3/a)

Answer 1

$\frac{a(a+3)+3(a+3)}{(a+3)(a-3)}: \frac{a+3}{a} = \frac{(a+3)(a+3)}{(a+3)(a-3)}* \frac{a}{a+3}= \frac{a+3}{a-3}* \frac{a}{a+3}= \frac{a}{a-3}$