SOLUTION: x^4 -3x^2-4=0

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Question 13296: x^4 -3x^2-4=0
Answer by rahman(247) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E4+-3x%5E2-4=0
%28x%5E2+-4%29%28x%5E2%2B1%29=0
%28x%2B2%29%28x-2%29%28x%5E2%2B1%29=0
%28x%2B2%29=0or%28x-2%29=0or%28x%5E2%2B1%29=0
x=-2 or x = 2 or x=i or x = -i
Solution for this problem is {-2,-i,i,2}
OK