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.
- $$f ( x ) = 3 x ^ { 4 } + 6 x ^ { 3 } - 3 x ^ { 2 } + 3 x + 1$$

A) No real solution
B) $0.25$
C) $- 5.06,0.25$
D) $- 2.53 , - 0.25$