Use the Zero or Root Feature of a Graphing Utility $f ( x ) = x ^ { 6 } - 4 x ^ { 4 } + x ^ { 2 } + 6$

Multiple Choice

Use the zero or root feature of a graphing utility to approximate the real zeros of the function $f ( x ) = x ^ { 6 } - 4 x ^ { 4 } + x ^ { 2 } + 6$ accurate to the nearest thousandth.

A) $\pm 1$ , 1.732, 1.414
B) -1.732, -1.414
C) $\pm$ 1.732, $\pm$ 1.414
D) 1.732, 1.414
E) $\pm 1$ , - 1.732, 1.414