/*
作者:一仁 06 沈婷筠
程式功能:File
日期:101/03/28
*/

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main()
{
FILE *fptr;
double a,b,c,D,X,x,n,i=1;
fptr=fopen("E:\\10030306\\in.txt","r");
if(fptr!=NULL)
{
fscanf(fptr,"%lf",&n);
while(i<=n)
{
fscanf(fptr,"%lf %lf %lf",&a,&b,&c);
D=pow(b,2)-4*a*c;
X=(-b+sqrt(D))/(2*a);
x=(-b-sqrt(D))/(2*a);
if(D>=0)
{
printf("%.3lf,%.3lf\n",X,x);
}
else
printf("none\n");
i=i+1;
}
fclose(fptr);
}
else
printf("File opening failure!");

system("PAUSE");
return 0;
}