Use the Given Zero to Find the Remaining Zeros of the Function

Multiple Choice

Use the given zero to find the remaining zeros of the function.
- $$f ( x ) = x ^ { 3 } + 2 x ^ { 2 } - 6 x + 8 \text {; zero: } 1 + i$$

A) $1 - i , 4$
B) $- 4,4$
C) $1 - \mathrm { i } , 4 \mathrm { i }$
D) $1 - \mathrm { i } , - 4$