Khan Academy: The Quadratic Formula: Example: Quadratics in Standard Form

Illuminate the world of mathematics for your class - specifically, the process of linear equations. In this video, Sal teaches about linear equations in standard form after two videos on slope-intercept and slope-point forms. He defines...

It's the video your algebra class has been waiting for - Sal explains the quadratic formula! He describes it as "one of at least the top five most useful formulas In mathematics" and recommends that it be memorized, as long as one also...

Armed with their newfound (or refreshed) knowledge of the quadratic formula, viewers can now work with Sal to prove the formula - an important skill that is often ignored in algebra. Once they learn how to both use and prove the...

You've been given a number written in expanded form. You have to write it in standard form, and in word form. The instructor does a nice job illustrating and explaining just how to do both of these operations.

Explains how to derive the quadratic formula by completing the square on the standard form of a quadratic equation. [7:34]

Get ready to set the standard! Pupils watch a video on how to graph a parabola from a quadratic in standard form without converting the form. Scholars learn how to find the axis of symmetry from the equation and from there the vertex....

Set the standard for working with polynomials. Pupils arrange two polynomial expressions in standard form. The scholars respond to questions about the terms, coefficients, and degrees of the polynomials. They then discuss how they...

Demonstrates how to solve a quadratic equation that begins in the form ax^2 + bx = c using the quadratic formula. [6:40]

This video demonstrates how to take linear equations written in either slope-intercept form or point-slope form and rewrite them in standard form of a linear equation. Right-click on the square at the bottom right for a full-screen view....

Given a linear equation, rewrite it in different forms. No matter what form a linear equation is given in, it can be converted to the other forms. So that means every linear equation can be written in standard form, point-slope form and...