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

    
    return 0;
}