Solve Quadratic Equations Using the Appropriate Methods and Formulas

This Solve Quadratic Equations Using the Appropriate Methods and Formulas video also includes:

This short but detailed video answers the questions of what to do with a quadratic equation once it's factored. After introducing the zero product property, the video walks through multiple examples of applying it to factorable quadratic equations. Placing particular emphasis on checking answers carefully sets learners up for future success when extraneous solutions enter the arena. A great video to have in your back pocket to remediate or introduce using the zero product property.

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CCSS: Designed
Instructional Ideas

  • Consider posting on a class website for pre-class viewing in the flipped classroom model or for learners to call up on-demand for homework help
  • Extend by giving young algebrists solutions and having them reverse-engineer a quadratic equation with those given answers
  • Ask learners to develop problems where checking the solution would yield a false statement or a physical problem where a numerical answer would have no real-life interpretation
Classroom Considerations

  • Viewing lesson video requires access to the Internet and the YouTube streaming video service
  • Lesson assumes that the class has already developed skills in factoring quadratics and skips straight from giving the quadratic problem to factored form
  • Consider pausing the video after each example is given, allowing for seatwork and questions
  • This resource is only available on an unencrypted HTTP website. It should be fine for general use, but don’t use it to share any personally identifiable information

  • Pleasant and easily understood narration
  • Examples develop from easy to harder, including non-1 leading coefficients and fractional results
  • Checking solutions is emphasized
  • Each problem worked out step-by-step and fully explained

  • No post-presentation seatwork or guided practice problems provided
  • Printable slides or accompanying note sheets not made available
Common Core