Question

The value -1 is a lower bound for the zeros of the function shown below.

ƒ(x)=x^4+x^3-11x^2-9x+18

A. True
B. False

Answer 1

B.False :D

Answer 2

\[{x}^{4}+{x}^{3}-11\,{x}^{2}-9\,x+18 =(x - 1) (x - 3) (x + 3) (x + 2)\]