Completing the Square by Boxed Rockets

Solve Using Completing the Square.

x^{2} - 14 x + 5 = 0

x = 7 \pm 2 \sqrt{11}

x^{2} + 14 x + 8 = 0

x = -7 \pm \sqrt{41}

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

x = -1 \pm \sqrt{5}

x^{2} + 8 x - 5 = 0

x = -4 \pm \sqrt{21}

x^{2} - 10 x + 9 = 0

x = 9 or 1

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

x = -8 \pm \sqrt{66}