# Ch 2: Algebra II: Complex and Imaginary Numbers Review

Watch online math video lessons and learn about negative square roots, imaginary numbers, the complex plane and more. These video lessons are short and engaging and make learning easy!

## Algebra II: Complex and Imaginary Numbers Review - Chapter Summary and Learning Objectives

The idea of working with numbers that don't really exist might sound confusing, but our experienced instructors have come up with several examples and sample problems to make concepts like negative square roots, complex numbers and imaginary axes believable enough. By the time you've finished viewing the lessons and quizzes included in this chapter, you should be able to do the following:

• Add, subtract, multiply and divide complex numbers
• Describe the differences between a coordinate and complex plane
• Solve polynomial equations with complex solutions

Video Objectives
What is an Imaginary Number? Learn why we use imaginary numbers to represent the square root of a negative number. Find out how they form complex numbers when combined with a real number.
How to Add, Subtract and Multiply Complex Numbers Follow steps for combining like terms and using the distributive property to add, subtract and multiply complex numbers.
How to Divide Complex Numbers Observe how a complex number's conjugate can be used to divide complex numbers.
How to Graph a Complex Number on the Complex Plane Learn how complex numbers are graphed on a real and imaginary axis.
How to Solve Quadratics with Complex Numbers as the Solution Use the discriminant to determine whether or not a quadratic equation has complex solutions. Explore uses of the zero product property to multiply higher order polynomials with complex solutions.

5 Lessons in Chapter 2: Algebra II: Complex and Imaginary Numbers Review
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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