Complex Numbers (part 1)

Learn more: http://www.khanacademy.org/video?v=kp...
Introduction to complex numbers. Adding, subtracting and multiplying complex numbers.

• Category

  Education

[antoinetteluvk]

Okay, so I have a really bad math teacher. He doesnt explian to use the principles whatsoever. He just gives us a problem to solve then he solves it, then he expects us to do the rest on our own. Now, I knew about Khan Academy so I watch the videos all the time. This is how I learn my math.. If i was brave enough to tell my math teacher to just let us watch a video from Khan Academy, I'd do it.

[lucyandljk]

Watching a productive 10 minute video instead of going to a 50 min lecture :D at home while eating subway :D

[MrMcVilla]

No, root -9 would be 3i. -9= 9i^2, so root -9 is root 9 multiplied by root i^2, which is 3i

[johnny hepworth]

0:44

[fireballBTF69]

wouldnt root -9 be 9i? since root -1 is i??? im confused

[murch2]

Dont confront. Propose. Tell about khanacademy and shat this treasure with other on your school.. and with your teacher.

[Chris Roberts]

thought you was gonna say bdi"s (0-0) lol

[leratluci]

would -3i also be a solution of (-9)^(1/2)? because if I square -3i I have -9

[adonyz666]

thats a z shirt

[Katie Humphreys]

Your fear keeps someone who doesn't know about Khan Academy from utilizing it. Please be think of your fellow classmates, and be brave!

[apriori1234]

Because -1 is real... thus defeating the point of i were -1