#include<bits/stdc++.h>
using namespace std;
bool wq(int n){
	if(pow(sqrt(n),2)==n){return 1;}
	else{return 0;}
}
int main(){
	int t,m;
	cin>>t>>m;
	for(int nymyj8=0;nymyj8<t;nymyj8++){
		int a,b,c,s;
		cin>>a>>b>>c;
		s=b*b-4*a*c;
		if(s<0){
			cout<<"NO"<<endl;
			continue;
		}
		else if(s==0){
			int g=gcd(-b,2*a);
			double fz=-b/g,fm=2*a/g;
			if(fm==1){cout<<fz<<endl;}
			else{cout<<fz<<"/"<<fm<<endl;}
		}
		else{
			if(wq(s)){
				int g=gcd(max(-b-int(sqrt(s)),-b+int(sqrt(s))),2*a);
				double fz=max(-b-int(sqrt(s)),-b+int(sqrt(s)))/g,fm=2*a/g;
				if(fm==1){cout<<fz<<endl;}
				else{cout<<fz<<"/"<<fm<<endl;}
			}
			else{cout<<endl;}
		}
	}
	return 0;
}