#include<cstdio>
#include<iostream>
#include<string>
#include<cstring>
#include<cmath>
#include<map>
#include<set>
#include<vector>
#include<algorithm>
#include<queue>
#include<stack>
using namespace std;
typedef long long ll;
int main()
{
    int t;
    cin >> t;
    while(t--)
    {
        ll a,b,c;
        cin >> a >> b >> c;
        bool yes = false;
        ll d = b*b - 4 *a *c;
        if(d < 0)
        {
            printf("NO\n");
            continue;
        }
        ll e = (ll)sqrt(d+0.5);
        if(e*e != d)
        {
            printf("NO\n");
            continue;
        }
        cout <<"YES"<<endl;
    }
    return 0;
}