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Videos, worksheets, examples, solutions, and activities to help Algebra students learn about solving quadratic equations by factoring with and without trial and error.

How to Use UnFOIL to Factor Quadratic Equations?
Using the unFOIL method to factor quadratic equations into two binomials requires many steps.
Example:
Factorize 2x2 - 5x - 12
Factoring quadratics without trial and error
This video shows a quick method for factoring quadratic expressions where the coefficient of the x squared term is not 1. This is a quick method that allows the correct answer to be achieved without trial and error and guess work.
Examples:
2x2 + 9x + 4
3x2 - x - 2
12x2 - 11x + 2

Example:
Solve the following quadratic equations by factoring
x2 - 4x = 12

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.