👤

Aratati ca (n+1)(n+2)=n^2 +3n + 2

Răspuns :

(n+1)(n+2)=n^2 +3n + 2
n^2+2n+n+2=n^2 +3n + 2
n^2 +3n + 2=n^2 +3n + 2, A