为什么错

#include<bits/stdc++.h>
using namespace std;
float a,b,c;
int main(){
	cin>>a>>b>>c;
	if(pow(b,2)-4*a*c<0){
		cout<<"No answer!";
	}
	else if(pow(b,2)-4*a*c==0){
		cout<<"x1=x2="<<-b/(2*a);
	}
	else{
		cout<<fixed<<setprecision(5);
		cout<<"x1="<<(-b+sqrt(pow(b,2)-4*a*c))/(2*a)<<";";
		cout<<"x2="<<(-b-sqrt(pow(b,2)-4*a*c))/(2*a);
	}
	return 0;
}