SOLUTION: x^4-33x^2-108=0

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Question 299911: x^4-33x^2-108=0
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
x^4-33x^2-108=0
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x^4 -36x^2+3x^2-108 = 0
x^2(x^2-36) + 3(x^2-36) = 0
(x^2-36)(x^2+3) = 0
(x-6)(x+6)(x-isqrt(3))(x+isqrt(3)) = 0
x = 6 or x = -6 or x = isqrt(3) or x = -isqrt(3)
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Cheers,
Stan H.
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