#include <stdio.h> #include<math.h> int main(void) { double a,b,c,x1,x2,x,sum,disc; scanf("%lf,%lf,%lf",&a,&b,&c); x=(-1.0*b)/(2*a); disc=b*b-4*a*c; sum=sqrt(disc)/(2*a); x1=x+sum; x2=x-sum; printf("x1=%7.4f,x2=%7.4f",x1,x2); return 0; }