Use a Graphing Calculator to Approximate the Real Zeros $$f ( x ) = x ^ { 4 } - 5 x ^ { 2 } + 6$$

Multiple Choice

Use a graphing calculator to approximate the real zeros. Give each zero as a decimal to the nearest tenth.
- $$f ( x ) = x ^ { 4 } - 5 x ^ { 2 } + 6$$

A) $3 , - 3,2 , - 2$
B) $1.7 , - 1.7,1.4 , - 1.4$
C) $1.7,1.4$
D) $- 1,1.8,1.8 , - 1.8$