#include <stdio.h>
#include <math.h>
int main()
{
float a,b,c,x1,x2;
scanf ("a=%f",&a);
scanf ("b=%f",&b);
scanf ("c=%f",&c);
x1=(-b+sqrt((b*b)-(4*a*c)))/(2*a);
x2=(-b-sqrt((b*b)-(4*a*c)))/(2*a);
printf ("x1=%.2f\n",x1);
printf ("x2=%.2f\n",x2);
return 0
}
#include <math.h>
int main() {
double a,b,c,x1,x2,delta;
scanf ("%lf%lf%lf",&a,&b,&c);
delta = b*b-4*a*c;
if(delta >= 0.0) {
x1 = (-b + sqrt(delta))/(2*a);
x2 = (-b - sqrt(delta))/(2*a);
printf ("x1 = %.2lf\n",x1);
printf ("x2 = %.2lf\n",x2);
}
else printf("没有实数根。\n");
return 0;
}
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