658. 一元二次方程公式
define _CRT_SECURE_NO_WARNINGS
include[HTML_REMOVED]
include[HTML_REMOVED]
int main()
{
double a = 0, b = 0, c = 0,x1=0,x2=0,y=0;
scanf(“%lf%lf%lf”, &a, &b, &c);
if (b * b - 4 * a * c < 0 || a == 0)
{ printf(“Impossivel calcular”);}
else
{y = b * b - 4 * a * c;
x1 = ( - b + sqrt(y)) / 2 / a;
x2 = ( - b - sqrt(y) )/ 2 / a;
printf(“R1 = %.5lf\nR2 = %.5lf”, x1, x2);}
return 0;
}