The Fundamental Theorem of Algebra

Question 1

Use the fundamental theorem of algebra and the complex conjugate theorem to determine the number and nature of the remaining root(s). Explain your thinking.

Revolt · Accepted Answer

The polynomial is degree 3, so it has three roots counting multiplicity. Two roots are given, leaving one remaining root. If the given roots are non-real complex conjugates, the remaining root must be real, since non-real roots occur in conjugate pairs.

Question 2

Did you include the following in your response?

Revolt · Accepted Answer

The degree of the polynomial is 3.; By the fundamental theorem of algebra, the function has three roots.; Two roots are given, so there must be one root remaining.; By the complex conjugate theorem, imaginary roots come in pairs.

The Fundamental Theorem of Algebra Answers

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