Math Is Fun Forum

I need help on my Quintic Equation Calculator. It uses the Netwon-Raphson method to approxmate the root and I have mainly got this all right. But heres the deal, sometimes the guess is real far away and I cant get it to converge quick enough, although I can press the Solve button again and it gives me the right answer. I have also noticed that sometimes it takes >5,000 tries before the answer converges. Can anyone help me find a new intial guess algorithm that will converge within 5,000 iterations? Thanks.

- Brian K

Quintic Equation Calculator: http://www.freewebs.com/brianjs/quinticequationcalculator.htm