text: #include <stdio.h>
  #include<math.h>
  int main()
  {
      double a,b,c;
      scanf("%lf%lf%lf",&a,&b,&c);
      if(b*b-4*a*c<0||a==0) printf("Impossivel calcular\n");
      else printf("R1 = %.5lf\nR2 = %.5lf\n",(-b+sqrt(b*b-4*a*c))/(2*a),(-b-sqrt(b*b-4*a*c))/(2*a));
      return 0;
  }
  