int main()
{
	char x1,x2;
	int n;
	float a,b,c;
	scanf("%d",&n);
	int i;
	for(i=1;i<=n;i++)
	{
		scanf("%f%f%f",&a,&b,&c);
		float e;
		e=b*b-4*a*c;
		if(e>0)
			printf("x1=%.5f;x2=%.5f\n",(-b+sqrt(b*b-4*a*c))/(2*a),(-b-sqrt(b*b-4*a*c))/(2*a));
		else
			if(e==0.0)
			printf("x1=x2=%.5f\n",(-b)/(2*a));
			else
				if(b==0)
				printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",(b)/(2*a),sqrt(-e)/(2*a),(b)/(2*a),(sqrt(-e))/(2*a));
				else
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",(-b)/(2*a),sqrt(-e)/(2*a),(-b)/(2*a),(sqrt(-e))/(2*a));
	}
	return 0;
}
