OML Search

Complex Numbers




 

Videos and lessons to help High School students know there is a complex number i such that i2 = –1, and every complex number has the form a + bi with a and b real.


Suggested Learning Targets


  • I know what are imaginary numbers and complex numbers.
  • I can write complex number in the form a + bi with a and b real.
  • I can simplify square roots of negative numbers using i.
  • I can rewrite arbitrary powers of i.

Common Core: HSN-CN.A.1

Related Topics:
Common Core (The Complex Number System)

Common Core for Mathematics

Imaginary and Complex Numbers

Imaginary Numbers Introduction
i2 = − 1
Solving Equations with i in the solution.


What Are Complex Numbers?
Imaginary Number: Square is a nonpositive real number
Complex Number: Square is a nonnegative real number
0 is both a complex and an imaginary number
Complex number has the form a + bi with a and b real
How to plot complex numbers on the Cartesian plane.





Introduction to i and Imaginary Numbers.


Square Root of Negative Numbers

Simplifying Square Roots of Negative Numbers Using i.



 

Expressing Square Roots of Negative Numbers with i
This video looks at simplifying square roots with negative numbers using the imaginary unit i. It includes 6 examples.


Rewrite Powers of i

Calculating i Raised to Arbitrary Exponents.




Rewriting Powers of ' i ' - Ex 1
Complex number ' i ', raise it to some different powers, and simplify.


Rewriting Powers of ' i ' - Ex 2
i raise to a negative power.



 

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway widget below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


OML Search


We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.


[?] Subscribe To This Site

XML RSS
follow us in feedly
Add to My Yahoo!
Add to My MSN
Subscribe with Bloglines