#include <bits/stdc++.h>
using namespace std;
main(){
	int a,b,c,n;
	cin>>n;
	for(int i=0;i<n;i++)
	{cin>>a>>b>>c;
	{if(sqrt(b*b-a*4*c)==int(sqrt(b*b-a*4*c))) 
	cout<<"Yes"<<endl;
	else 
	cout<<"No"<<endl;
	
	} 
}
}