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 - i, 4i
D) 1 - i, -4