SOLUTION: What are the complex roots of f(x)=x^4+x^2+4 and how do you find them?

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Question 506753: What are the complex roots of f(x)=x^4+x^2+4 and how do you find them?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
What are the complex roots of f(x)=x^4+x^2+4 and how do you find them?
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Use the Quadratic Formula:
x^2 = [-1 +- sqrt(1 -4*4)]/2
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x^2 = [-1 +- sqrt(-15)]/2
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x^2 = [-1+ i*sqrt(15)]/2 or x^2 = [-1-isqrt(15)]/2
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x = sqrt of each of the above.
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Cheers,
Stan H.
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