Algebra-2

Question Analysis
This problem assesses the student's ability to apply the Conjugate Root Theorem, which states that if a polynomial with real coefficients has a complex root, its conjugate is also a root.

Key Concept Explanation
The Conjugate Root Theorem ensures that non-real roots of polynomials with real coefficients always occur in conjugate pairs. If is a root, then is also a root.

Step-by-step Solution
1. Identify the given root: