# Ch 3: Working with Complex Numbers

Watch online video lessons to learn about imaginary numbers, complex conjugates, the complex plane and more. Take the brief quizzes that accompany each lesson to track your progress.

## Working with Complex Numbers - Chapter Summary and Learning Objectives

Use the lessons included here to wrap your head around the idea of imaginary numbers and explore their place alongside real numbers on the complex plane. Our instructors provide you with a simple explanation of how imaginary numbers make it possible to work with expressions that include negative square roots - which technically don't exist - and show you the steps involved in solving equations with these types of numbers. Take advantage of the short instructional videos, their matching transcripts and the multiple-choice quizzes included here to learn how to do the following:

• Define an imaginary number
• Perform arithmetic operations with complex numbers
• Find the complex conjugate of a binomial
• Graph complex numbers on the complex plane

Video Objectives
What Is an Imaginary Number? Learn how imaginary numbers are used to represent the square root of a negative number. Find out what makes up a complex number.
How to Add, Subtract and Multiply Complex Numbers Apply formulas for adding and subtracting complex numbers. Study the order of operations used to multiply complex numbers.
How to Divide Complex Numbers Understand how to find a binomial's complex conjugate. Learn how it can be used to divide complex numbers.
How to Graph a Complex Number on the Complex Plane Practice graphing complex numbers on the complex plane's real and imaginary axes.

4 Lessons in Chapter 3: Working with Complex Numbers
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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