MahraniImran, M.Agusni2013-06-102013-06-102013-06-10Rangga Dwijunanda Putrahttp://repository.unri.ac.id:80/handle/123456789/3649We discuss an iterative method to solve a nonlinear equation, which is free from derivatives by approximating a derivative in the two-step Newton method by the method of undetermined coefficients and forward difference. We show analytically that the method is of three orde for a simple root. Numerical experiments show that the new method is comparable with other discussed methods.otherforward differencefree derivative methoditerative methodorder of convergenceundetermined coefficient methodOther