SOLUTION: i need help solving this 15x^4-14x^2+3=0

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Question 446095: i need help solving this 15x^4-14x^2+3=0
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
i need help solving this 15x^4-14x^2+3=0
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Use Inverse FOIL to get:
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15x^4-9x^2-5x^2+3 = 0
3x^2(5x^2-3)-(5x^2-3) = 0
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(5x^2-3)(3x^2-1) = 0
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x^2 = 3/5 or x^2 = 1/3
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x = +/-sqrt(15)/5 or x = +/-sqrt(3)/3
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Cheers,
Stan H.