Completing the Square and Quadratic Formula 1
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Lesson Summary:
In Completing the Square and Quadratic Formula 1, the quadratic formula is derived by completing the square of an equation in standard form. The lesson provides a step-by-step explanation of how to derive the quadratic formula and offers a song to remember it. By simply inputting the values of a, b, and c into the quadratic formula, the solutions for x can be found quickly and easily.
Lesson Description:
Part 6 of completing the square. This video shows how to derive the quadratic formula by completing the square, and has a song to remember the quadratic formula.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- What is the quadratic formula?
- Why does the quadratic formula work?
- How do you derive the quadratic formula by completing the square?
- How can you use the quadratic formula to solve quadratic equations?
- How do you solve 2x^2 - 3x - 7 using the quadratic formula?
- How do you solve a quadratic equation in the form ax^2 + bx + c = 0 using the quadratic formula?
- What is the quadratic formula song?
- What is a song that goes along with the tune of Pop Goes the Weasel for the quadratic formula?
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Staff Review
This video shows how to derive the quadratic formula by completing the square. Although this lesson may be confusing for students, it should serve as proof that the quadratic formula works and does the same thing as completing the square to solve a quadratic equation, but it is faster and easier to use. This is a great comprehensive video explaining how to arrive at the quadratic formula by completing the square.
