Find a Rational Zero of the Polynomial Function and Use $$f ( x ) = x ^ { 3 } + 2 x ^ { 2 } - 5 x - 6$$

Multiple Choice

Find a rational zero of the polynomial function and use it to find all the zeros of the function.
- $$f ( x ) = x ^ { 3 } + 2 x ^ { 2 } - 5 x - 6$$

A) $\{ - 3 , - 1,2 \}$
B) $\{ - 2,1,3 \}$
C) $\{ - 3 \}$
D) $\{ - 1 \}$