Answer:
most likely C) 4.8 cm
Step-by-step explanation:
Solution
if the number _C__ is a root of a polynomial, then x-c is a factor.
Whenever we have a polynomial
Example
Ok, on the table is says f(x), in the question is says f where x is -2, so go down the f(x) side of the table and find the number it correlates with, which is 3 :)