#include <stdio.h>
#include <math.h>

double solve(double a,double b,double c){
	if(a==0){
		return -c/b;
	}
	if(b*b-4*a*c<0){
		printf("Complex\n");
		return 0;
	}
	return (-b+sqrt(b*b-4*a*c))/2/a;
}

int main(void){
	double a,b,c,x;
	a=1.0;
	b=3.0;
	c=2.0;
	x=solve(a,b,c);
	printf("x=%lf\n",x);
	return 0;
}