Question

Aratati ca F(x)=x^2+5x+4/x^2+x-12 =x+1/x-3 pt. orice x∈R\{-4:3}

Answer 1

⇒(x+1)(x+4)/(x-3)(x+4)=x+1)/(x-3)   se simplifica⇒
(x+1)/(x-3)/(x+1)/(x-3)