Use a Graphing Calculator to Approximate the Real Zeros of the Function

Multiple Choice

Use a graphing calculator to approximate the real zeros of the function defined by f(x) . Express decimal approximations to
the nearest hundredth.
- $$f ( x ) = x ^ { 4 } - 2.44 x ^ { 3 } - 12.25 x ^ { 2 } + 21.56 x + 17.68$$

A) $2.33 , - 0.63 , - 3.12,3.86$
B) $2.33 , - 3.12 , - 3.86$
C) $- 2.33 , - 0.63 , - 3.12 , - 3.86$
D) $0.63 , - 3.86$