#include <cmath>
#include <cstdio>
#define LL long long
//------------------------------------------------------------
LL  sqr(LL d) { return d*d; }
//------------------------------------------------------------
int  tcase;
int  icase;

LL   a,b,c,d,d2;
//------------------------------------------------------------
int  main( )
{
    for (scanf("%d",&tcase); ++icase<=tcase; )
    {
        scanf("%I64d%I64d%I64d",&a,&b,&c);
        d=b*b-4LL*a*c;
        d2=(LL)sqrt((double)d);
        
        if(sqr(d2)==d) printf("YES\n");
            else printf("NO\n");
    }
}