Find the Zeros of the Function $$f ( x ) = x ^ { 2 } - 9 x - 9$$

Multiple Choice

Find the zeros of the function. Give exact answers.
- $$f ( x ) = x ^ { 2 } - 9 x - 9$$

A) $\frac { - 9 \pm 3 \sqrt { 5 } } { 2 }$
B) $\frac { 9 \pm 3 \sqrt { 13 } } { 2 }$
C) $\frac { - 9 \pm 3 \sqrt { 13 } } { 2 }$
D) $\frac { 9 \pm 3 \sqrt { 5 } } { 2 }$