Oh 9i is a root of the polynomial function f(x), which of the following must also be a root of f(x)? a. -9i b. -1/9i c. 1/9i d. 9 - i

The best answer is A. The possible roots of this polynomial function 9i and -9i. It is possible that this polynomial function is a quadratic equation. It has a degree of two which means there are two roots and it is possible that the positive and negative value of 9i are its roots.

Istg idk..if there all the same length there all the same number but use google