#include <iostream>
#include <stdio.h>
#include <string.h>
#include <string>
#include <queue>
#include <stack>
#include <vector>
#include <math.h>
#include <map>
#include <stdlib.h>
#include <algorithm>

#define eps 1e-5
#define inf 0x3f3f3f3f
#define max(a,b) ((a)>(b)?(a):(b))
#define min(a,b)  ((a)<(b)?(a):(b))
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1 | 1
#define lc rt<<1
#define rc rt<<1 | 1
#define getx2(a)  ((a)*(a))
#define Pi acos(-1.0)
#define N 100010

typedef long long LL;
using namespace std;
int main()
{
    int t;
    scanf("%d",&t);
    LL a,b,c;
    while(t--)
    {
        scanf("%I64d%I64d%I64d",&a,&b,&c);
        LL det=b*b-4*a*c;
        LL n=(LL)sqrt(det+0.0);
        if(n*n!=det)
        {
            printf("NO\n");
            continue;
        }
        else
        {
            int aa=-b+n;
            int bb=-b-n;
            if(aa<0&&bb<0)
            {
                printf("YES\n");
                continue;
            }
            else
            {
                printf("NO\n");
            }
        }
    }
    return 0;
}