读完交个作业

import math

def quadratic(a,b,c):
        delta = b*b-4*a*c
        if a==0:
                if b==0:
                        if c==0:
                                print('无穷解')                
                        else:
                               print('无解')
                else:
                        print('只有一个解：',-c/b)
        elif delta >=0:
                x1 = (-b + math.sqrt(delta))/(2*a)
                x2 = (-b - math.sqrt(delta))/(2*a)
                return x1,x2
        else:
                delta <0
                print('解是共轭复根，我懒得算了')