Solve the Polynomial Equation by Using the Root Method $$\frac { 1 } { 2 } x ^ { 3 } + 4 = 0$$

Solve the polynomial equation by using the root method.
- $$\frac { 1 } { 2 } x ^ { 3 } + 4 = 0$$

A) $2 , - 2$
B) $- 2$
C) 2,0
D) 2