Домашняя, 3_1

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    double a,b,c,x1,x2,D;
    cout<<"a=";
    cin>>a;
    cout<<"b=";
    cin>>b;
    cout<<"c=";
    cin>>c;
    D=(b*b)-(4*a*c);
    if (D<0)
        {
        cout<<"ne imeet vesch. resheniy";
    }
    if (D==0)
    {
        x1=(-1*b)/(2*a);
        cout<<"x="<<x1;
    }
    if (D>0)
    {
        x1=((-1*b)+(sqrt(D)))/(2*a);
        x2=((-1*b)-(sqrt(D)))/(2*a);
        cout<<"x1="<<x1<<endl;
        cout<<"x2="<<x2;
    }
    return 0;
}