Answer:
Option B.-3
Step-by-step explanation:
we know that
An x-intercept is a value of x when the value of the function f(x) is equal to zero
we have
[tex]f(x)=x^{3}-x^{2}-8x+12[/tex]
Determine the roots of the function f(x) by graphing
using a graphing tool
The roots are x=-3, x=2
see the attached figure
