Solve the Cubic Equation Using Factoring and the Quadratic Formula $$x ^ { 3 } + 1 = 0$$

Multiple Choice

Solve the cubic equation using factoring and the quadratic formula.
- $$x ^ { 3 } + 1 = 0$$

A) $\{ - 1 , \pm i \}$
B) $\left\{ - 1 , \frac { 1 } { 2 } \pm \frac { \sqrt { 3 } } { 2 } i \right\}$
C) $\{ - 1,1 \pm i \sqrt { 3 } \}$
D) $\{ - 1 , - 1 \pm i \sqrt { 3 } \}$