Quadratic roots question C++14

The question : https://www…com/problems/QUADROOT

#include
#include <math.h>
using namespace std;
int main()
{
float a,b,c,x1,x2,d;
cin>>a>>b>>c;
d= (bb)-(4ac)
x1= ((-b) + sqrt(d)) / (2
a);
x2= ((-b) - sqrt(d)) / (2*a);
cout<<x1<<endl<<x2;
return 0;
}

copiler shows wrong output every single time !!
Please help amazing coders!