The Quadratic Formula

Sick of ads?‚Äč Sign up for MathVids Premium
Taught by MrRutter
  • Currently 3.0/5 Stars.
7858 views | 1 rating
Meets NCTM Standards:
Lesson Summary:

In this lesson, we learn about the quadratic formula and how it can be used to solve quadratic equations. The quadratic formula is a general form of the equation, Ax^2 + Bx + C = 0, where A, B, and C are coefficients. By plugging in the values, the formula can be used to solve the equation. The lesson also covers how to factor quadratic equations, as well as the discriminant, which tells us whether the roots of the equation are real or imaginary.

Lesson Description:

Learn how to solve quadratic equations using the Quadratic Formula.

Questions answered by this video:
  • What is the Quadratic Formula?
  • How do you solve quadratic equations using the Quadratic Formula?
  • How do you solve x^2 + x - 6 = 0 using the quadratic formula?
  • How do you know what numbers go into a, b, and c in the quadratic formula?
  • How do you solve x^2 + x - 6 = 0 by factoring?
  • How do you solve 3x^2 + 2x + 5 = 0 using the quadratic formula?
  • What is the discriminant and what does it tell you about your solutions?
  • What happens if you have the square root of a negative number in the quadratic formula?
  • How can you tell how many answers you should have and what they should look like with the discriminant?
  • Staff Review

    • Currently 3.0/5 Stars.
    This lesson is a step-by-step tutorial for plugging numbers into the quadratic formula and solving. A great video for learning how this formula works and for some extra practice. The discriminant is explained, and a problem is even done in which the solution is imaginary and also irrational.