Completing the Square by Boxed Rockets

Solve Using Completing the Square.

x^{2} + 16 x + 3 = 0

x = -8 \pm \sqrt{61}

x^{2} - 8 x + 6 = 0

x = 4 \pm \sqrt{10}

x^{2} + 4 x - 5 = 0

x = 1 or -5

x^{2} + 8 x + 9 = 0

x = -4 \pm \sqrt{7}

x^{2} + 14 x - 6 = 0

x = -7 \pm \sqrt{55}

x^{2} + 12 x + 9 = 0

x = -6 \pm 3 \sqrt{3}