SOLUTION: The orignal equation started like this: {{{x^4+18=11x^2}}} Eventually i simplified it to this {{{(x+3)(x-3)(x^2-2)}}} So would my answer just be -3 and 3? What do i do with

Question 119941: The orignal equation started like this:

Eventually i simplified it to this

So would my answer just be -3 and 3? What do i do with the since its unfactorable?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
x^4+18=11x^2
x^4 - 11x^2 + 18 = 0
Factor to get:
(x^2-9)(x^2-2)=0
x^2-9 = 0 or x^2-2 = 0
(x-3)(x+3)= 0 or (x-sqrt2)(x+sqrt2)=0
x = 3 or x=-3 or x=sqrt2 or x=-sqrt2
======================
Cheers,
Stan H.
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