#include <stdio.h>

#include <math.h>

void main()


{

    float a,b,c,delt,x1,x2;

    printf("输入方程的三个系数");

    scanf("%f%f%f",&a,&B,&c);

    delt = b * b - 4 * a * c;

    x1 = (-b + sqrt (delt) / (2 * a));

    x2 = (-b - sqrt (delt) / (2 * a));

    printf("方程的解分别为：x1 = %.2f x2=%.2f\n",x1,x2)

}