int main()
{   int n,i;
    scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		double a,b,c,d,x1,x2;
		scanf("%lf%lf%lf",&a,&b,&c);
	    
	    d=(double)b*b-4*a*c;
	    if(d<0)
		{double m,n;
		 m=-b/(2*a);
		 n=(sqrt(4*a*c-b*b))/(2*a);
	     printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",m,n,m,n);
		}
	    else
		{
		 x1=(-b + sqrt(b*b-4*a*c))/(2*a);
		 x2=(-b - sqrt(b*b-4*a*c))/(2*a);
		 if(x1!=x2)
         printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
		 else	
	     printf("x1=x2=%.5lf\n",x1,x2);	  
			}
	}
	
	return 0;
}