Solve the Equation $x ^ { 2 } + 12 x + 27 = 0$

Solve the equation. $x ^ { 2 } + 12 x + 27 = 0$

A) {-9, 3}
B) {9, 3}
C) {12, 27}
D) {9, -3}
E) {-9, -3}