# [Rd] PR#751

**mark0060@tc.umn.edu
**
mark0060@tc.umn.edu

*Wed, 17 Jan 2001 03:52:00 +0100 (MET)*

I'd just like to report a possible R bug--or rather, confirm an existing one
(bug #751).
I have had some difficulty using the polyroot() function.
For example, in Win 98, R 1.1.1,
>* polyroot(c(2,1,1))
*
correctly (per the help index) gives the roots of 1 + (1*x) + (2*x^2) as
[1] -0.5+1.322876i -0.5-1.322876i
However,
>* polyroot(c(-100,0,1))
*
gives the roots of
[1] 10+0i -10+0i
which corresponds to -100 + x^2, not 1 - (100*x^2).
Also,
>* polyroot(c(0,0,0,1))
*
gives
[1] 0+0i 0+0i -10+0i
which aren't all roots of x^3.
Thanks for all your efforts.
I apologize if I'm missing something.
Kristian Markon
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