Solve the Quadratic Equation Using the Quadratic Formula (If Necessary $x ^ { 2 } + 12 x + 85 = 0$

Short Answer

Solve the quadratic equation using the quadratic formula (if necessary, round the result to three significant digits). $x ^ { 2 } + 12 x + 85 = 0$ x = _____ $\pm$ ______j