If a root is [tex]4 + i\, 17[/tex], then another root of the polynomial must be [tex]4 - i\,17[/tex].
Let suppose that given polynomial is a quadratic equation. According to the quadratic formula, there are two complex roots of the form [tex]\alpha + i\,\beta[/tex] and [tex]\alpha - i\,\beta[/tex] when discriminant is less than zero.
If a root is [tex]4 + i\, 17[/tex], then another root of the polynomial must be [tex]4 - i\,17[/tex] according to the quadratic formula.
We kindly invite to check this question on quadratic formula: https://brainly.com/question/9300679