SOLUTION: What's the solution for: x^4 + 11x^2 - 80

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Question 88830: What's the solution for:
x^4 + 11x^2 - 80
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
To solve this you want to write it:
x^4 + 11x^2 - 80 = 0
:
Factor and solve for x^2:
(x^2 + 16)(x^2 - 5) = 0
:
x^2 = +5
x = +Sqrt(5)
x = -Sqrt(5)
These are the only real solutions
:
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