int main()
{
float a,b,c,n,i,j,x,y;
  scanf("%f",&n);
   for(i=1;i<=n;i=i+1)
   {
      scanf("%f %f %f",&a,&b,&c);
      j=b*b-4*a*c;
      if(j>0)
      {printf("x1=%.5f;x2=%.5f\n",((-b+sqrt(j))/(2*a))+0.000001,(-b-sqrt(j))/(2*a))+0;}
      else
            if(j==0)
            {printf("x1=x2=%.5f\n",(-b)/(2*a))+0;}
            else
               {printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",(-b)/(2*a)+0,sqrt(-j)/2/a+0,(-b)/(2*a)+0,sqrt(-j)/2/a)+0;}
              }  
 }             
