int main()
{
    double a,b,c,x1,x2,n,m;
    scanf("%lf",&n);
    for(m=1;m<=n;m++)
    {
    scanf("%lf %lf %lf",&a,&b,&c);
    x1=(-b + sqrt(b*b-4*a*c))/(2*a),x2=(-b - sqrt(b*b-4*a*c))/(2*a);
    if(b*b-4*a*c>0)
        {
                   printf("x1=%.5lf;x2=%.5lf\n",((0-b) + sqrt(b*b-4*a*c))/(2*a),((0-b) - sqrt(b*b-4*a*c))/(2*a) ) ;
        }
    else if(b*b-4*a*c==0)
        {
                        printf("x1=x2=%.5lf\n",x1);
        }            
    else
        {
                     printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",((0-b))/(2*a),sqrt(4*a*c-b*b)/(2*a),((0-b))/(2*a),sqrt(4*a*c-b*b)/(2*a));
        }
    }                                           
    
}