The Square Root Of Negative One

In which we look at the numerous results of defining 'i' to be the square root of negative one.
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00:00 Intro
00:12 The Imaginary Unit
00:47 Multiplying "i" By Itself
01:34 Imaginary And Complex Numbers
03:57 Addition
04:54 Multiplication
06:10 Square And Square Root
07:02 Euler's Identity
10:23 Review