# Complex Numbers 1

Taught by YourMathGal
• Currently 4.0/5 Stars.
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Lesson Description:

Introduction to the Imaginary unit (imaginary number) i which is the square root of -1, and complex numbers. Several examples are provided, showing how to simplify square roots of negative numbers, define pure imaginary numbers, state the standard form of a complex number, and identify the real and imaginary parts of a complex number in standard form.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

• What are complex numbers?
• What is the imaginary unit i?
• How do you take the square root of a negative number?
• What is standard form of a complex number?
• What are the real and imaginary parts of a complex number?
• What is the square root of -1?
• What is the square root of -9?
• Why does i^2 = -1?
• What is a pure imaginary number?
• What is the square root of -25?
• How do you simplify the square root of -18?
• #### Staff Review

• Currently 4.0/5 Stars.
This video explains the idea of the imaginary unit i and complex numbers. Simplifying square roots of negative numbers and working with complex numbers are shown in this video. All topics involved are explained very well in this video.