## Complex Numbers 2

Complex Numbers 2
• Currently 4.0/5 Stars.
1547 views, 2 ratings - 00:10:05
Part of video series Complex Numbers
Taught by YourMathGal

### Meets NCTM Standards:

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Several examples are provided, showing how to simplify square roots of negative numbers, and multiply and divide with imaginary and complex numbers.
• What is a complex number?
• How do you compute square roots of negative numbers?
• What is the square root of -50?
• What is 5*sqrt(-45)?
• What is -6*(square root of -9)?
• What is sqrt(-11)*sqrt(-11)?
• What is the square root of -41 times the square root of -41?
• What is the square root of -2 times the square root of -8?
• What is the square root of -6 times the square root of -10?
• What is the square root of -18 divided by the square root of 2?
• What is the square root of -1?
• Why isn't the square root of a negative times the square root of a negative equal to a positive?
This video shows a bunch of example problems for simplifying square roots of negative numbers that are multiplied or divided. The steps involved in simplifying these expressions are explained very well. This is a great way to try out the complex number skills that you have just learned.
• Currently 4.0/5 Stars.
Reviewed by MathVids Staff on June 14, 2010.