Question

Find the polynomial function with roots 11 and 2i.
help please:)

Answer 1

(x-11)(x-2i)=x^2-(11+2i)x+22i?

Answer 2

if 2i is a root then -2i must be root

Answer 3

(x-11)(x-2i)(x+2i)=0

Answer 4

or for a real polynomial (x-11)(x^2+4)=x^3-11x^2+4x-44
but this also has -2i as a root as cinar says

Answer 5

Thank you:)