SOLUTION: x^4 + 3(x^2) - 4 = 0 solve it in the complex number system Thank you!

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Question 777266: x^4 + 3(x^2) - 4 = 0
solve it in the complex number system
Thank you!
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
x^4 + 3(x^2) - 4 = 0
solve it in the complex number system
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x^4 + 3(x^2) - 4 = 0
(x^2+4)(x^2-1)=0
..
x^2+4=0
x^2=-4
x=±√-4=±2i
..
x^2-1=0
x^2=1
x=±1
...
roots are: ±1, ±2i