public class Funcion extends Ecuacion{
    double masa;
    public Funcion(double masa){
      this.masa=masa;
    }
    double f(double x){
         double y=masa*masa*x*x*x*x-4*masa*masa*x*x*x
+3*masa*masa*x*x-3*masa*x*x+4*masa*x-masa;
        return y;
  }
} 

public class Aplicacion {
 public static void main(String[] args) {
     double masa=2.0;
     Funcion f=new Funcion(masa);
     try{
            double xMax=f.puntoMedio(0.0, 1.0);
            System.out.println(xMax);
        }catch(RaizExcepcion ex){
            System.out.println(ex.getMessage());
        }
  }

}