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.turner@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
>

	[[alternative HTML version deleted]]

