Algebra Formulas

Solving equations, lines, and the quadratic formula.

• The Quadratic Formula - The quadratic formula solves any equation of the form a x squared plus b x plus c equals 0. See what it means, why it works, worked examples, and free practice.
• The Slope Formula - The slope of a line is the rise over the run: the change in y divided by the change in x. See what it means, why it works, worked examples, and free practice.