Completing the Square by Boxed Rockets

Solve Using Completing the Square.

x^{2} + 12 x - 5 = 0

x = -6 \pm \sqrt{41}

x^{2} - 16 x + 8 = 0

x = 8 \pm 2 \sqrt{14}

x^{2} - 2 x - 10 = 0

x = 1 \pm \sqrt{11}

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

x = -4 \pm \sqrt{14}

x^{2} - 2 x - 3 = 0

x = 3 or -1

x^{2} - 16 x + 8 = 0

x = 8 \pm 2 \sqrt{14}