# -*- coding: UTF-8 -*-
__metaclass__=type
import math
#一元二次方程求解x^2+2x+1=0
def yiyuan_jie(a,b,c):
??? delta=b*b-4*a*c
??? if delta<0:
??????? return u'無(wú)解岭佳！'
??? try:
??????? if delta==0:
??????????? return -(b/(2*a))
??????? if delta>0:
??????????? squart_delta=math.sqrt(delta)
??????????? x1=(-b+squart_delta)/(2*a)
??????????? x2=(-b-squart_delta)/(2*a)
??????????? return '{:.2f} {:.2f}'.format(x1,x2)
??? except ZeroDivisionError:
??????? print u'分母不能為零摊阀！'
if __name__=='__main__':
??? print yiyuan_jie(5,8,1)
