题目描述

用#include[HTML_REMOVED]中的sqrt进行开方
注意除以(2*a)要加括号

样例

#include <iostream>
#include<cmath>
using namespace std;

int main()
{
    double a,b,c,d,x1,x2;
    scanf("%lf %lf %lf",&a,&b,&c);
    d=b*b-4*a*c;
    if(d<0||a==0)printf("Impossivel calcular");
    else 
    {
    x1=(-b+sqrt(d))/(2*a);
    x2=(-b-sqrt(d))/(2*a);
    printf("R1 = %.5lf\nR2 = %.5lf\n",x1,x2);
    }
    return 0;
}