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Khan Academy
Khan Academy: Algebra: Completing the Square for Quadratic Equations
Demonstrates how to complete the square for the general form of a quadratic equation, ax^2 + bx + c = 0, which results in the quadratic formula. [9:31]
Khan Academy
Khan Academy: Algebra: Solving Quadratic Equations by Completing the Square
Explains how to solve two different quadratic equations using the completing the square method. [14:06]
Khan Academy
Khan Academy: Comparing Maximum Points of Quadratic Functions
Find out which quadratic function has the lowest maximum value. [3:58]
Imagine Learning Classroom
Learn Zillion: Find the Maximum or Minimum Value of a Quadratic Function
This video explains how to find the least or greatest value of a quadratic function by rewriting the function in vertex form. [4:34]
Khan Academy
Khan Academy: Worked Example: Completing the Square (Intro)
Sal completes the quadratic x-squared minus 44x into a perfect square. [3:21]