#include <cmath>
#include <string>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <algorithm>

using namespace std;


int main (void)
{
    double a, b, c, sum1, sum2, sum3, temp;
    int t;

    scanf("%d",&t);
    while(t--)
    {
        scanf("%lf%lf%lf",&a,&b,&c);
        sum1 = b*b-4*a*c;
        sum1 = sqrt(sum1);
        temp = sum1 - int(sum1);
  //      printf("%lf\n",temp);
        if(temp != 0)
        {
            printf("NO\n");
            continue;
        }
/*
        sum2 = -b + sum1;
        sum2 = sum2/(2*a);
        temp = sum2 - int(sum2);
        printf("%lf\n",temp);
        if(temp != 0)
        {
            printf("NO\n");
            continue;
        }

        sum3 = -b - sum1;
        sum3 = sum3/(2*a);
        temp = sum3 - int(sum3);
        printf("%lf\n",temp);
        if(temp != 0)
        {
            printf("NO\n");
            continue;
        }
        */
        printf("YES\n");
    }

    return 0;
}