SOLUTION: Find all zeros of f(x)={{{4x^4+36}}}

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Question 1067024: Find all zeros of f(x)=4x%5E4%2B36
Found 2 solutions by Lightning_Fast, ikleyn:
Answer by Lightning_Fast(78) About Me  (Show Source):
You can put this solution on YOUR website!
4x%5E4%2B36
Factor out 4.
4%28x%5E4%2B9%29
That's the most you can do.

Answer by ikleyn(53763) About Me  (Show Source):
You can put this solution on YOUR website!
.
4x^4 + 36 = 0

is equivalent to


x^4 = 9.


The roots are  sqrt%283%29,  -sqrt%283%29,  i%2Asqrt%283%29  and  -i%2Asqrt%283%29,  where  i = sqrt%28-1%29  is the imaginary unit.