Handout
Purple Math

Purplemath: Complex Numbers: Introduction

For Students 9th - 10th Standards
This website provides an in-depth lesson on complex numbers. You learn about simplifying, adding, and multiplying complex numbers by viewing example problems that are worked through step-by-step. Continue on to pages 2 and 3 which...
Unit Plan
OnlineMathLearning.com

Online Math Learning: Factor Polynomials With Complex Roots

For Students 9th - 10th Standards
A collection of video lessons with example problems and solutions to help students learn how to extend polynomial identities to the complex numbers. Includes interactive widget for working on the modeled problems or trying your own.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: N Cn, a Rei Complex Square Roots

For Teachers 9th - 10th Standards
Working with complex numbers allows us to solve equations that cannot be solved with real numbers. Here we will investigate complex numbers which arise as square roots of certain complex numbers. Aligns with N-CN.A.2 and A-REI.A.1.