Order 4 polynom

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Is there a website that given the coefficients of a order 4 polynom, it will give me all 4 roots of this polynom?

Thanks.
 

radou

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Is there a website that given the coefficients of a order 4 polynom, it will give me all 4 roots of this polynom?

Thanks.
Hope this helps: http://www.themathpage.com/aPreCalc/factor-theorem.htm" [Broken].
 
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mathwonk

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you are looking for the quartic formula, discovered in the 1500s. surely it is out there, perhaps on wolfram.
 

mathwonk

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here you go:

http://planetmath.org/encyclopedia/QuarticFormula.html [Broken]
 
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Well, if you want to use a calculator, like the TI-86, it will find an approximation of the roots fast....Maybe that is what you mean.

As for the entry given on PlanetMath.Org, I note at the bottom of that page the "disclaimer": The formulas for the roots are much too unwieldy to be used for solving quartic equations by radicals, even with the help of a computer.
 

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