Lesson plan

Understand and discover extraneous solutions to a square root equation by using inverse operations to solve

teaches Common Core State Standards CCSS.Math.Content.HSA-REI.A.2 http://corestandards.org/Math/Content/HSA/REI/A/2

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Big Ideas: Solutions for radical equations can be found analytically and/or using tables and graphs, and the inverse relationship between square root and quadratic functions can be used to explain the notion of extraneous roots. In this lesson, students will solve square root equations using inverse operations, and in attempting to verify their results will discover that some of the values found when solving are extraneous solutions. Vocabulary: square root, square, solution, inverse