Question

Which is the least possible degree of a polynomial that has roots -5,1+4i, and -4i

Answer 1

D

Explanation:

Answer 2

The non real roots 1+4i and -4i will also have their complements as roots:- 1 - 4i and 4i

So the least number of roots = 5 and this will also be the least possible degree of the polynomial.

answer 5