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Find all complex numbers z  such that z^4 = -4

 

Form should be in a + bi

 

Please help

 


 

 Feb 20, 2021
 #1
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$z^4=-4$

$z^4+4=0$

solving quartic polynomial, the roots are

$-1-i$

$-1+i$

$1-i$

$1+i$

 Feb 20, 2021
 #2
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How did you get those answers though

Guest Feb 20, 2021
 #3
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I use vietas formula

 Feb 21, 2021

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