What are the solutions to the system of equations?

y = x ^ 2 + 5x + 6;
y = 3x + 6

(- 3, 0) and (0, 6);
(0, - 3) and (6, 0);
(- 3, 0) and (- 2, 0);
(0, 6) and (- 2, 0)