#include <stdio.h> #include<math.h> int main() { double a,b,c; while(~scanf("%lf%lf%lf",&a,&b,&c)) { if(a==0) { printf("Not quadratic equation"); } else if(a!=0) { if((pow(b,2)-4*a*c)==0) { if((-1*b+sqrt(pow(b,2)-4*a*c))/(2*a)==0) { printf("x1=x2=0.00"); } else printf("x1=x2=...
