include<bits/stdc++.h>

using namespace std;
int main(){
double a,b,c;
cin>>a>>b>>c;
double d=bb-4ac;
double i=sqrt(d);
double x1,x2,x;
if (a==0){
cout<<"x="<<-c/b;
}
if (a=!0){
if (d==0){
cout<<"x="<<b/2a;
}
else if (d<0){
cout<<"pt vo nghiem";
}

}

else {
cout<<"x1="<<(-b-i)/(2a)<<'\n';
cout<<"x2="<<(-b+i)/(2a);
}
}