#include <cstdio>
#include <cmath>
using namespace std;

int main()
{
    int T;
    scanf("%d", &T);
    while(T--)
    {
        long long a,b,c;
        scanf("%I64d %I64d %I64d", &a, &b, &c);
        long long d = b * b - 4 * a * c;
        if(d < 0)
        {
            printf("NO\n");
            continue;
        }
        long long sqr = sqrt(d);
        if(sqr * sqr != d)
        {
            printf("NO\n");
            continue;
        }
        long long fz1 = -b + sqr;
        long long fz2 = -b - sqr;
        long long fm = 2 * a;
        //printf("%I64d %I64d\n", fz1, fz2);
        if(a * fz1 % fm != 0 || a * fz2 % fm != 0)
        {
            printf("NO\n");
            continue;
        }
        printf("YES\n");
    }
    return 0;
}