#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main (void)
{
    FILE *in;
    int a,x2,x1,x0,i,D;
    double ans1,ans2;
   
    in=fopen("E:\\10032406\\FILE0328\\in.txt","r");
    if(in!=NULL)
    {
        fscanf(in,"%d",&a);
        for (i=1;i<=a;i++)
        {
            fscanf(in,"%d %d %d",&x2,&x1,&x0);
            D=x1*x1-4*x2*x0;
            if(D>=0)
            {
                ans1=((-1)*x1+sqrt(D))/(2*x2);
                ans2=((-1)*x1-sqrt(D))/(2*x2);
                printf("%.3lf,%.3lf\n",ans1,ans2);
            }
            else
                printf("none\n");
        }
        fclose(in);
    }
    else
        printf("File Opening Failure");
       
    system("PAUSE");
    return 0;
}

/*
none
none
-0.500,-1.000
-1.000,-1.000
-0.049,-12.351
請按任意鍵繼續 . . .
*/