how much accuracy does it have when I have a polynomial of thousands of
orders?
Thank you!
On Wed, Apr 18, 2012 at 3:49 PM, Rolf Turner <rolf.tur...@xtra.co.nz> wrote:
> On 19/04/12 08:14, Michael wrote:
>
>> Is there a way to find all roots of a polynomial equation?
>>
>> Lets say
>>
>> x^5+a*x^4+b*x^3+c*x^2+d*x+e=0
>>
>>
>> how to find its all roots?
>>
>
> I believe that Galois (or maybe it was Abel) proved that this
> is *NOT* possible, a couple of centuries ago.
>
> However if you are thinking of *numerical* methods (i.e. supplying
> numerical values for a, b, ..., e before you start) then polyroot()
> will do it for you. As
>
> RSiteSearch("zeroes of polynomial")
>
> would have told you. (Seventh hit.)
>
> cheers,
>
> Rolf Turner
>
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