#include<cstdio>
#include<cmath>
#include<algorithm>
using namespace std;
typedef long long LL;
LL a, b, c;
int work(){
    LL t = b * b - 4 * a * c;
    LL x = (int)floor(sqrt(t + 0.5));
    if(x * x == t){
        return 1;
    }
    else{
        return 0;
    }
}
int main(){
    int T;
    scanf("%d", &T);
    while(T--){
        scanf("%I64d%I64d%I64d", &a, &b, &c);
        puts(work() ? "YES" : "NO");
    }
}