Which of the following statements must be true about the polynomial function f(x)? O 1f1+ 13 is a root of f(x), then -1- 13 is also a root of f(x).
O If 1 + 137 is a root of f(x), then 1- 131 is also a root of f(x).
O If 13 is a root of f(x), then–13 is also a root of f(x).
O If-13 + i is a root of f(x), then 13+ / is also a root of f(x).