Use LINEST in for =LINEST(y-range, x-range^{1,2}.... if you mean how do you
fit to a second order curve - see my website
If you want to solve a quadratic, let me know.
best wishes
--
Bernard V Liengme
www.stfx.ca/people/bliengme
remove caps from email

"HANY" wrote in message
...
How do I make FORMULA TO SOLVE CURVE OR 2ND ORDER EQUATION?