Algebra-2

Question Analysis
This problem evaluates the student's understanding of the Conjugate Root Theorem, which is crucial for finding the complete set of roots of a polynomial with real coefficients.

Key Concept Explanation
The Conjugate Root Theorem states that if a polynomial with real coefficients has a complex root , then its conjugate is also a root. This ensures that the polynomial remains with real coefficients.

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