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Course: Algebra 2 > Unit 2
Lesson 5: Multiplying complex numbersComplex number operations review
Review complex number addition, subtraction, and multiplication.
Addition | ||
Subtraction | ||
Multiplication | ||
Want to learn more about complex number operations? Check out these videos:
Practice set 1: Adding and subtracting complex numbers
Example 1: Adding complex numbers
When adding complex numbers, we simply add the real parts and add the imaginary parts. For example:
Example 2: Subtracting complex numbers
When subtracting complex numbers, we simply subtract the real parts and subtract the imaginary parts. For example:
Want to try more problems like this? Check out this exercise.
Practice set 2: Multiplying complex numbers
When multiplying complex numbers, we perform a multiplication similar to how we expand the parentheses in binomial products:
Unlike regular binomial multiplication, with complex numbers we also consider the fact that .
Example 1
Example 2
Example 3
Want to try more problems like this? Check out this basic exercise and this advanced exercise.
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