#include<iostream>
#include<string>
#include<cstdio>
#include<algorithm>
#include<cmath>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        long long a,b,c;
        cin>>a>>b>>c;
        long long k=b*b-4*a*c;
        if(k==(long long)sqrt(k*1.0)*(long long)sqrt(k*1.0))
        {
            cout<<"YES"<<endl;
        }
        else
        {
            cout<<"NO"<<endl;
        }
    }
    //system("pause");
}