Leave nothing to the imagination! Learners view a thorough lesson on imaginary numbers that introduces the concept, shows how to simplify square roots of negative numbers, and then how to solve quadratic equations with imaginary solutions. The lesson provides a variety of examples of varying difficulty levels.

Concepts

solving quadratics, imaginary numbers, complex numbers, complex roots

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Instructional Ideas

• Incorporate in a flipped classroom instruction unit
• Post the video as a resource for absent pupils

Classroom Considerations

• Expects a solid understanding of solving quadratic equations with real number solutions
• Fits as the first in a series of four lessons in a complex number unit

• This video is hosted on YouTube

Pros

• Connects complex roots to their visual representations
• Provides both note taking and practice documents to accompany the video

Cons

• None

Common Core

RI.11-12.7 SL.11-12.2 HSN-CN.A.2 HSA-REI.B.4.a HSA-REI.B.4.b