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Problem with Mathematica driving me nuts

• To: mathgroup at smc.vnet.net
• Subject: [mg46791] Problem with Mathematica driving me nuts
• From: bpw67deletethis at hotmail.com (benwoodward.com)
• Date: Mon, 8 Mar 2004 04:10:27 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

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.

• Follow-Ups:
  • Re: Problem with Mathematica driving me nuts
    • From: Daniel Lichtblau <danl@wolfram.com>
  • Re: Problem with Mathematica driving me nuts
    • From: Tomas Garza <tgarza01@prodigy.net.mx>
  • Re: Problem with Mathematica driving me nuts
    • From: Murray Eisenberg <murray@math.umass.edu>