
int main()
{
	int n,i;
	
	double a,b,c,e,d;
	scanf("%d\n",&n);
	
	for (i=0;i<n;i++)

	{
		scanf("%lf%lf%lf",&a,&b,&c);
		e=b*b-4*a*c;
		d=(-b/(2*a));


	
         if(e>0)
	        printf("x1=%.5lf;x2=%.5lf\n",d+sqrt(e)/(2*a),d-sqrt(e)/(2*a));
	     else if(e==0)
	        printf("x1=x2=%.5lf\n",d);
         else
	        printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",d,sqrt(-e)/(2*a),d,sqrt(-e)/(2*a)); 
	 }
	return 0;
}

