Question

(n^2-2n-3)/n-3 n diferit de 3

Answer 1

n²-2n-3=n²-3n+n-3=n(n+1)-3(n+1)=(n+1)(n-3)
raportul devine:(n+1)(n-3)/n-3)=n+1→deoarece (n-3) se reduce