#一元二次方程形为：ax^2+bx+c=0(a!=0)
a = eval(input()) #获取a的值
b = eval(input()) #获取b的值
c = eval(input()) #获取c的值
delta=b**2-4*a*c
if delta>0:
x1=(-b+(delta)**0.5)/(2*a)
x2=(-b-(delta)**0.5)/(2*a)
print('x1=%.4f,x2=%.4f'%(x1,x2)) #结果保留4位小数
elif delta==0:
x1=-b/2*a
print('x1=%.4f'%(x1))
else:
print('无实数根')
