Question

If a polynomial function f(x) has roots 4 – 13i and 5, what must be a factor of f(x)?
(x + (13 – 4i))
(x – (13 + 4i))
(x + (4 + 13i))
(x – (4 + 13i))

Answer 1

hint
if x=a is a root of a polynomial p(x)
then x-a can be said to be a factor of the polynomial p(x)