#include <cstring>
#include <iostream>
#include <stdio.h>
#include <cmath>
using namespace std;

int Case;
typedef long long ll; 
int main() {
    scanf("%d",&Case);
    while(Case -- ){
        ll a,b,c;

        scanf("%I64d%I64d%I64d",&a,&b,&c);
        ll tmp = b * b - 4 * a * c;
        if(tmp < 0) {
            printf("NO\n");
            continue;
        } 
        
        ll sq = sqrt((double)tmp);
        ll x1 = (2 * a) * (- b + sq);
        ll x2 = (2 * a) * (- b - sq);
        if(sq * sq == tmp && (x1 > 0 && x2 > 0|| x1 < 0 && x2 < 0 )) {
            puts("YES");
        }
        else {
            puts("NO");
        }
    }
}