Find ALL the real and complex roots (Simple explanation)

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Can you find the REAL and COMPLEX roots of this 4th power equation? This video serves as a great introduction to those wanting to learn about complex (imaginary) roots. Pause the video and give it a go. I'll then take you through each step in a CLEAR and ACCURATE way so that you can understand how to easily solve this and similar problems in the future. Enjoy.

No calculators or lucky guesses allowed ;)

#PiSquared educates in #Mathematics from a basic intro level all the way up to #Math #Olympiad standard covering a wide range of topics including #Algebra #Trigonometry #Logarithms #Calculus and much, much more.

#PiSquared also sets #Maths puzzles and offers tips and tricks to make your life easy, often getting answers in just a few seconds, I even include some Maths humour for your amusement!

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I am a former Financial Analyst with extensive knowledge of finance, mathematics, science, computer systems, economics and analytics.
I'm also highly skilled in Excel and building complex mathematical and statisical models.
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Thanks for this. I'm aware imaginary and complex numbers exist but haven't gotten to them in my course yet. Very nice simple example to help get my head around. (Although I still don't really understand why we can take the sqr root of a negative and its not just undefined, and what applicationsit has)

michaelcolbourn
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Another great video. Thanks, mate! 👍🍺

bigm
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We know that i^2 = -1 and also (-i)^2 = -1, but why should sqrt(-1) = i? Why not sqrt(-1) = -i?

WolfgangKais
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