Find a Polynomial of Least Degree with Only Real Coefficients $2 - \mathrm { i } , - 6$

Multiple Choice

Find a polynomial of least degree with only real coefficients and having the given zeros.
- $2 - \mathrm { i } , - 6$

A) $f ( x ) = x ^ { 3 } + 4 x ^ { 2 } - 20 x + 30$
B) $f ( x ) = x ^ { 3 } - 2 x ^ { 2 } - 19 x - 30$
C) $f ( x ) = x ^ { 3 } + 2 x ^ { 2 } - 19 x + 30$
D) $f ( x ) = x ^ { 3 } - 2 x ^ { 2 } - 19 x + 24$