Question

(n+3)|(n la puterea a doua+6n+17)

Answer 1

(n+3) | (n²+6n+9)+8
(n+3) | (n+3)² +8
(n+3)| (n+3)² ⇒ (n+3) | 8
⇒ n+3 ∈ D8⇒n+3 ∈ {1,2,4,8}⇒ n∈{1,5}