Find the Zeros of the Polynomial Function $$f ( x ) = x ^ { 3 } + 3 x ^ { 2 } - x - 3$$

Multiple Choice

Find the zeros of the polynomial function.
- $$f ( x ) = x ^ { 3 } + 3 x ^ { 2 } - x - 3$$

A) $x = - 1 , x = 1 , x = - 3$
B) $x = 1 , x = - 3 , x = 3$
C) $x = - 3 , x = 3$
D) $x = 9$