import math
def quadratic(a , b , c):
l = b ** 2 - 4*a*c
if l <0:
print('无解')
elif l >0:
x1 = (-b + math.sqrt(l))/2*a
x2 = (-b - math.sqrt(l))/2*a
print('此方程有两个根：%s,%s'%(x1,x2))
else:
print('此方程只有一个根%s'%x1)
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大胖墩与小黑孩
import math
def quadratic(a , b , c):
l = b ** 2 - 4*a*c
if l <0:
print('无解')
elif l >0:
x1 = (-b + math.sqrt(l))/2*a
x2 = (-b - math.sqrt(l))/2*a
print('此方程有两个根：%s,%s'%(x1,x2))
else:
x1 = (-b + math.sqrt(l))/2*a
print('此方程只有一个根%s'%x1)