Someone

double a=1;
        double b=3;
        double c=2;
        int lp;
        double delta;
        double pdelty;
        double x1;
        double x2;
        
        delta=b*b-4*a*c;
        if (delta>0){
            lp=2;
            pdelty=Math.sqrt(delta);
            x1=(-b-pdelty)/(2*a);
            x2=(-b+pdelty)/(2*a);
            
        }else{
            if (delta==0){
                lp=1;
                  x1=-b/(2*a);
                x2=x1;
                              
            }else{
                lp=0;
            }
            
        }
        System.out.println("Liczba pierwiastków= "+lp);
        if(lp>0){
            System.out.println("x1= "+x1);            
        }
        if(lp>1){
            System.out.println("x2= "+x2);
        }
    }
    
}