Finding Complex Roots using the Quadratic Formula

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Taught by mrbrianmclogan
  • Currently 3.0/5 Stars.
6463 views | 1 rating
Part of video series
Meets NCTM Standards:
Errors in this video:

The instructor correctly identifies the "b" value as negative 6, but uses positive 6 as his value at one point in the quadratic formula. He still ends up with the correct solutions to the equation.

Lesson Summary:

In this lesson, you will learn how to find the complex roots of a quadratic equation using the quadratic formula. The instructor demonstrates through an example equation, showing how to identify the values of A, B, and C and how to use them to solve the equation. They also explain the discriminant and how it can be used to determine the type of solutions you will get. Finally, the instructor simplifies the expression to get the final solution and explains how to factor it down to get the roots.

Lesson Description:

How to find the complex roots of an equation using the quadratic formula

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Questions answered by this video:
  • How do I find the roots of a quadratic equation using the quadratic formula?
  • How do I simplify the imaginary roots of a quadratic equation after using the quadratic formula.
  • Staff Review

    • Currently 3.0/5 Stars.
    The intructor solves a quadratic equation using the quadratic formula. He then simplifies the imaginary solutions.