#include <iostream>
#include<math.h>
using namespace std;
int main()
{
float a,b,c,d,e,f,g,h,i,j;
cin>>a;
cin>>b;
cin>>c;
d=b*b-4*a*c;
e=-b/(2*a);
f=sqrt(d)/(2*a);
g=sqrt(-d)/(2*a);
h=e+f;
i=e-f;
if (d==0)
{
cout<<"root are equal ="<<e<<"";
}
if(d>0)
{
cout<<"roots are "<<h<<" and "<<i<<"";
}
if(d<0)
{
cout<<"roots are"<<e<<"+i"<<g<<" and "<<e<<"-i"<<g<<"";
}
return 0;
}
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