public ActionResult MetodoSecante(metodoSecante_model model, string submitbutton)
        {
            MetodoDeLaSecante metsec = new MetodoDeLaSecante();

            model.ans       = new Answer_Model();
            metsec.function = model.function;
            metsec.XO       = model.XO;
            metsec.Xl       = model.X1;
            metsec.EPS      = model.EPS;
            metsec.EPSI     = Convert.ToDecimal(model.EPSI);
            metsec.MAXIT    = model.MAXIT;
            model.ans.Res   = metsec.solve();
            if (model.ans.Res[0] == 'L')
            {
                model.ans.status = 1;
            }
            else
            {
                model.ans.status = 2;
            }
            return(View(model));
        }
        public ActionResult MetodoSecante()
        {
            metodoSecante_model model = new metodoSecante_model();

            model.function = "x^3 + 2x^2 + 10x - 20";
            model.XO       = 0;
            model.X1       = 1;
            model.EPS      = 0;
            model.EPSI     = "0.001";
            model.MAXIT    = 4;
            MetodoDeLaSecante metsec = new MetodoDeLaSecante();

            model.ans        = new Answer_Model();
            metsec.function  = "x^3 + 2x^2 + 10x - 20";
            metsec.XO        = 0;
            metsec.Xl        = 1;
            metsec.EPS       = 0;
            metsec.EPSI      = 0.001m;
            metsec.MAXIT     = 4;
            model.ans.Res    = metsec.solve();
            model.ans.status = 0;
            return(View(model));
        }