SOLUTION: solve X^4-23x^2-108=0 thanks

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Question 369419: solve X^4-23x^2-108=0




thanks
Answer by mananth(16946) About Me  (Show Source):
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x^4-23x^2-108=0
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x^4-27x^2+4x^2-108=0
x^2(x^2-27)+4(x^-27)=0
(x^2-27)(x^2+4)=0
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