#include<iostream>
#include<map>
#include<cstdio>
#include<cmath>
using namespace std;
int T , M;
bool check(int a , int b , int c){
	if(pow(b,2) - 4 * a * c < 0){
		return false;
	}
	return true;
}
int gcd(int a , int b){
	if(a % b == 0) return b;
	return gcd(b , a % b);
}
bool check(int a ,int b ,int c , int x){
	if(a * pow(x , 2) + b * x + c * x == 0) return true;
	return false; 
}
void print_num(int k , int num){
	int ret = 1;
	int numkk = k;
	for(int i = 2 ; i * i <= numkk ; i++){
		int cntk = 0;
		while(k % i == 0){
			k /= i;
			cntk++;
			if(cntk == 2){
				cntk = 0;
				ret *= i;
			}
		}
	}
	int kkk = gcd(ret , num);
	k = numkk / pow(ret , 2);
	ret /= kkk;
	num /= kkk;
	if(k == 0) return ;
	if(k == 1){
		cout <<  ret;
		if(num != 1){
			cout <<"/"<< num;
		}
	}
	else{
		if(ret != 1){
			cout <<  ret << "*sqrt(" << k << ")";
			if(num != 1)cout << "/" << num;
		}
		else{
			cout << "sqrt(" << k << ")";
			if(num != 1)cout << "/" << num;
		}
	}
}
int main(){
//	freopen("uqe.in","r",stdin);
//	freopen("uqe.out","w",stdout);
	cin >> T >> M;
	for(int i = 1 ; i <= T ; i++){
		int a , b , c;
		cin >> a >> b >> c;
		if(!check(a , b , c)){
			cout << "NO" << endl;
			continue;
		}
		int numk = ((-1 * b + sqrt(pow(b,2) - 4*a*c)) / 2/a);
		if( numk * 2 * a== -1 * b + sqrt(pow(b,2) - 4*a*c) ){
			cout << (-1 * b + sqrt(pow(b,2) - 4*a*c)) / 2 / a << endl;
		}
		else{
			int kc = -1 * b / 2 / a;
			if(kc != 0) {
				if(kc * 2 * a == -1 * b){
					cout <<-1 * b / a / 2;
					if(!check(a , b , c , -1 * b / a / 2 )) cout << "+";
				}
				else{
					cout <<-1* b << "/" << a * 2 ;
					if(!check(a , b , c , -1 * b / a / 2 )) cout << "+";
				}
			}
			else{
				if(-1 * b != 0)cout << -1 * b / gcd(abs(-1 * b),2 * a) << "/" << a * 2/ gcd(abs(-1 * b),2 * a);
				if(!check(a , b , c , -1 * b / a / 2 )) cout << "+";
			}
			int k = pow(b,2) - 4*a*c;
			print_num(k,2 * a);
			cout << endl;
		}
	}
}

样例都对，提交上去WA了