Completing the Square

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Taught by MrRutter
  • Currently 2.0/5 Stars.
6373 views | 5 ratings
Meets NCTM Standards:
Lesson Summary:

In this lesson on completing the square, you'll learn how to solve quadratic equations. First, you'll learn how to square a binomial, which involves finding the square of the first term and last term, then multiplying the two terms together and doubling them to get the middle term. Then, you'll learn how to use this concept in reverse to solve quadratic equations. By manipulating the equation into a squared form, you can solve for x by taking the square root of both sides and adding or subtracting to find the solutions. This method can be confusing at first, but once you understand it, it will make solving equations much easier.

Lesson Description:

Learn how to solve quadratic equations by completing the square.

Questions answered by this video:
  • How do you solve quadratic equations?
  • What is the shortcut to squaring binomials?
  • What is the easiest way to do (x + 3)^2?
  • What is (2x - 5)^2?
  • What is completing the square?
  • How do you solve a quadratic equation by completing the square?
  • How do you solve x^2 - 5x - 2.75 = 0?
  • Is there a fast and easy way to do completing the square?
  • Staff Review

    • Currently 3.0/5 Stars.
    This video covers solving quadratic equations by completing the square. This is a process that is usually confusing and difficult for students, and this lesson shows an easy way of thinking about this idea. It starts off by squaring a binomial, and then it shows how to go backward. A must-see completing the square lesson.
  • jbhawkins

    • Currently 2.0/5 Stars.
    dont use decimals for the example