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: 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]
Sophia Learning
Sophia: Locating the Maximum and Minimum of a Parabola
This video tutorial describes how to determine if the vertex of a parabola is the minimum or maximum. The lesson includes a detailed example.