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The number 16 has four fourth roots. Find them. I know they are \(2, -2, 2i, -2i\), but I can't explain. Please explain.
 

 Jun 17, 2020
edited by Guest  Jun 17, 2020
 #1
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try multiplying them out.

eg

(-2i)^4 = -2i*-2i*-2i*-2i = 16*i^2*i^2 = 16*-1*-1 = +16

 Jun 17, 2020

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