The Quadratic Formula is just that: a formula.
. . . . .For ax<sup>2</sup> + bx + c = 0, the solution is given by:
. . . . .x = (-b ± sqrt[b<sup>2</sup> - 4ac]) / (2a)
Plug the coefficient values from your equation into the Formula, and chug away to the answer.
Eliz.