Learning Resource Type

Classroom Resource

Finding Imaginary Solutions

Subject Area

Mathematics

Grade(s)

9, 10, 11, 12

Overview

This informational material will explain how to find all zeroes of a polynomial equation, including complex solutions. It will also introduce the concept of imaginary solutions. There is a corresponding video available. Practice questions with a PDF answer key are provided.  

    Mathematics (2019) Grade(s): 09-12 - Precalculus

    MA19.PRE.6

    Analyze possible zeros for a polynomial function over the complex numbers by applying the Fundamental Theorem of Algebra, using a graph of the function, or factoring with algebraic identities.

    Unpacked Content

    UP:MA19.PRE.6

    Vocabulary

    • Zeros
    • Fundamental Theorem of Algebra
    • Quadratic Polynomial

    Knowledge

    Students know:
    • The definition of the degree of a polynomial.
    • The difference between real and complex roots.

    Skills

    Students are able to:
    • Find roots of a polynomial algebraically and/or graphically.
    • Rewrite an imaginary number as a complex number.

    Understanding

    Students understand that:
    • The degree of a polynomial determines the number of roots, some which may be real, complex, or used more than once.
    • Only real roots will be x-intercepts on a graph.
    Link to Resource

    CR Resource Type

    Informational Material

    Resource Provider

    CK-12
    Accessibility

    Accessibility

    Text Resources: Content is organized under headings and subheadings
    Video resources: includes closed captioning or subtitles
    License

    License Type

    Custom
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