Solve the following equation for x: x^2 + 9 = 0
Solve the following equation for x: x^2 +6x +10 = 0
Solve the following equation for x: x^2 + 16x = 0
Solve the following equation for x: x^2 + 2x - 3 = 0
Solve the following equation for x: x^2 - 4 = 0
Solve the following equation for x: 5x^2 - 3x - 2 = 0