Use a Graphing Calculator to Approximate the Real Zeros $$f ( x ) = x ^ { 3 } + 3 x ^ { 2 } - 3 x - 9$$

Multiple Choice

Use a graphing calculator to approximate the real zeros. Give each zero as a decimal to the nearest tenth.
- $$f ( x ) = x ^ { 3 } + 3 x ^ { 2 } - 3 x - 9$$

A) $3,1.7 , - 1.7$
B) $3,1.6 , - 1.6$
C) $- 3,1.8 , - 1.8$
D) $- 3,1.7 , - 1.7$