Basic functions: Polynomial functions
Solving quadratic equations in disguise
Find the exact real solutions of the following equation. \[x^4-4x^2-12=0\]
Enter your answer in the form \(x=a\vee x=b\ldots\) if there are two or more solutions, in the form \(x=a\) if there is one solution, and the word none if there are no solutions.
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