<PRE><B>Question 1013018</B>
Find four roots of the following equation:

2x^4 +5x^2 = 207
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Divide by x^2-9 to get 2x^2 + 23
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Solve 2x^2 + 23 = 0
2x^2 = -23
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x^2 = -11.5
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x = isqrt(11.5) or x = -isqrt(11.5)
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Cheers,
Stan H.
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