Use the Intermediate Value Theorem for Polynomials to Show That $f ( x ) = x ^ { 4 } - 9 x ^ { 2 } + 18 ; 1.7$

Use the intermediate value theorem for polynomials to show that the polynomial function has a real zero between the
numbers given.
- $f ( x ) = x ^ { 4 } - 9 x ^ { 2 } + 18 ; 1.7$ and $1.8$

A) $f ( 1.7 ) = 0.3421$ and $f ( 1.8 ) = 0.6624$
B) $f ( 1.7 ) = 0.3421$ and $f ( 1.8 ) = - 0.6624$
C) $f ( 1.7 ) = - 0.3421$ and $f ( 1.8 ) = - 0.6624$
D) $f ( 1.7 ) = 0.6579$ and $f ( 1.8 ) = - 0.6624$