# Finding Complex Roots using the Quadratic Formula

Taught by mrbrianmclogan
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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

I show how to solve math problems online during live instruction in class. This is my way of providing free tutoring for the students in my class and for students anywhere in the world. Every video is a short clip that shows exactly how to solve math problems step by step. The problems are done in real time and in front of a regular classroom. These videos are intended to help you learn how to solve math problems, review how to solve a math problems, study for a test, or finish your homework. I post all of my videos on YouTube, but if you are looking for other ways to interact with me and my videos you can follow me on the following pages through My Blog, Twitter, or Facebook.

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.