Finding x-intercepts of a Quadratic Equation

Sick of ads?‚Äč Sign up for MathVids Premium
Taught by mrbrianmclogan
  • Currently 3.0/5 Stars.
6006 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson, you will learn how to find the x-intercepts of a quadratic equation. By finding the values of A, B, and C, you can determine the components of the polynomial. Then, through factoring, you can find out which two numbers will multiply to give you your A times C value and add it to give you B. This will lead you to the equation x minus 4 times x plus 3 equals 0, which you can solve for to find the x-intercepts, which in this case are x equals 4 and x equals negative 3.

Lesson Description:

Finding the x intercepts of a quadratic equation

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:
  • What does finding the x-intercept of a quadratic equation mean ?
  • What must you do to find the x-intercepts of a quadratic equation ?
  • Staff Review

    • Currently 3.0/5 Stars.
    It would be good to highlight the fact that at the x-intercept y=0.That is why the quadratic equation must be equated to zero.