Question

Ma poate ajuta si pe mine cineva?Multumesc mult.

Answer 1

$\it Fie\ x,\ y\ cele\ dou\breve a\ numere.\\ \\ x\cdot y=15=-15\cdot(-1)=-5\cdot(-3)=-3\cdot(-5)=-1\cdot(-15)=\\ \\ =1\cdot15=3\cdot5=5\cdot3=15\cdot1\\ \\ x+y\in\{-16,\ -8,\ 16,\ 8\}$