Question

question 8 of 10
a polynomial has one root that equals 2 + i. name one other root of this polynomial.
answer here

Explanation:

Step1: Recall conjugate root theorem

For polynomials with real coefficients, complex roots come in conjugate pairs.

Step2: Find conjugate of given root

The conjugate of $2+i$ is $2-i$.

Answer:

$2 - i$