/*
作者:王婕
解目:檔案開啟
日期:2012/03/28
*/

#include<stdio.h>
#include<stdlib.h>
#include<math.h>

int main()
{
    FILE *fptr;
    double a,b,c;
    double X1,X2,X3,X4,D;
    double r,sh;
    int n,i;
   
    fptr= fopen("E://haha//ste.txt","r");
    fscanf(fptr,"%d",&n);
   
    for(i=0;i<n;i++)
    {
       
        fscanf(fptr,"%lf %lf %lf",&a,&b,&c);
       
        D=pow(b,2)-4*a*c;   
        if(D>=0)
        {
               X1=(((-1)*b)+sqrt(D))/(2*a);
               X2=(((-1)*b)-sqrt(D))/(2*a);
          
               printf("%.3lf , %.3lf\n",X1 , X2);
        }
        else
        {           
               printf("none\n");
        }
        
    } 
    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 . . .
*/