Re: Problem with Mathematica driving me nuts

*To*: mathgroup at smc.vnet.net*Subject*: [mg46793] Re: Problem with Mathematica driving me nuts*From*: "Graham Michalk" <gmichalk at optushome.com.au>*Date*: Tue, 9 Mar 2004 04:30:38 -0500 (EST)*References*: <c2he1m$ahd$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Ben, Mathematica 4.2 delivers your results. Mathematica 5.0.0 delivers, in both cases: {x -> 2.} Graham M "benwoodward.com" <bpw67deletethis at hotmail.com> wrote in message news:c2he1m$ahd$1 at smc.vnet.net... > FindRoot[x^2 == 4x - 4, {x, 1}] > > Out[4]= > {x -> 1.99902} > > In[15]:= > FindRoot[x^2 - 4*x + 4, {x, 3}] > > Out[15]= > {x -> 2.00098} > > When the root is clearly two. > Is Mathematica using Newton's Method like a Ti-92? > Even if so, why wont it give a more accurate answer? > I've tried N[%,30] but it doesn't do anything. > I'm new to Mathematica coming over from a Ti-92, so everything is > frustrating right now. > Thanks. >