Completing the Square by Boxed Rockets

Solve Using Completing the Square.

x^{2} + 6 x - 4 = 0

x = -3 \pm \sqrt{13}

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

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

x^{2} + 12 x - 10 = 0

x = -6 \pm \sqrt{46}

x^{2} + 10 x - 8 = 0

x = -5 \pm \sqrt{33}

x^{2} + 14 x - 3 = 0

x = -7 \pm 2 \sqrt{13}

x^{2} + 8 x - 3 = 0

x = -4 \pm \sqrt{19}