Question

CPOЧHO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Будет первый вариант: -b/t

Answer 2

$\frac{t^2-b}{t}-t=\\=\frac{t^2-b}{t}-\frac{tt}{t}=\\=\frac{t^2-b-tt}{t}=\\=-\frac{b}{t}$