Solve Quadratics by Factoring (GCF, X-method)
This page outlines the complete process for solving quadratic equations by factoring, combining all the techniques learned.
The steps for solving are:
- Make the equation equal to zero addtheoppositeifnecessary.
- Factor out the GCF, if possible.
- Use the X-method to factor further, if possible.
- Set each factor to zero and solve for x.
Vocabulary: The solutions to a quadratic equation are also called roots, zeros, or x-intercepts.
Example: For x² - 10x + 16 = 0, we factor to get x−2x−8 = 0, leading to solutions x = 2 or x = 8.
The guide provides several practice problems with detailed solutions, including:
- 3x² + 25n + 20 = 0
- x² + 16x + 60 = 0
- 2x² + 13x + 42 = 0
Highlight: When solving quadratic equations, always remember to set the equation to zero before factoring.
This comprehensive guide provides students with the tools and practice needed to master solving quadratic equations by factoring.