SOLUTION: x^5-3x^3-4x=0 solve under the set of complex numbers

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Question 1105029: x^5-3x^3-4x=0
solve under the set of complex numbers
Answer by Alan3354(69443) About Me  (Show Source):
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x^5-3x^3-4x=0
solve under the set of complex numbers
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x = 0 is one.
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x^4 - 3x^2 - 4 = 0
(x^2 - 4)*(x^2 + 1) = 0
x = +2, -2
x = +i, -i