Completing the Square by Boxed Rockets

Solve Using Completing the Square.

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

x = 1 or -3

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

x = -6 \pm 3 \sqrt{5}

x^{2} - 10 x - 7 = 0

x = 5 \pm 4 \sqrt{2}

x^{2} + 6 x + 7 = 0

x = -3 \pm \sqrt{2}

x^{2} + 16 x + 5 = 0

x = -8 \pm \sqrt{59}

x^{2} - 16 x + 9 = 0

x = 8 \pm \sqrt{55}