Find the Zeros of the Function $$f ( x ) = x ^ { 2 } - 5 x - 8$$

Multiple Choice

Find the zeros of the function. Give exact answers.
- $$f ( x ) = x ^ { 2 } - 5 x - 8$$

A) $\frac { 5 \pm \sqrt { 57 } } { 2 }$
B) $\frac { - 5 \pm \sqrt { 57 } i } { 2 }$
C) $\frac { - 25 \pm \sqrt { 57 } } { 2 }$
D) $\frac { 15 \pm \sqrt { 57 } } { 2 }$