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Student Support Forum: 'getting complex root with odd-degree polynomial' topicStudent Support Forum > General > Archives > "getting complex root with odd-degree polynomial"

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James T
10/04/06 9:19pm

Hi,

I think an odd-degree polynomial with real coefficients have at least one real root.
However, when I evaluate
Root[-38167 + 239457 #1 - 474600 #1^2 + 295936 #1^3 &, 3] with Mathematica (using "ToRadicals") or Solve[-38167 + 239457 x - 474600 x^2 + 295936 x^3 == 0, x], all three roots are complex.
Does anyone know why?

Thank you,
James


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Subject (listing for 'getting complex root with odd-degree polynomial')
Author Date Posted
getting complex root with odd-degree polynomial James T 10/04/06 9:19pm
Re: getting complex root with odd-degree polyno... yehuda ben-s... 10/05/06 1:29pm
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