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交作业

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涵_天

#1 Created at ... [Delete] [Delete and Lock User] 
    der_ta = b**2-4*a*c
    if der_ta >=0:
        return (-b+math.sqrt(der_ta))/(2*a),(-b-math.sqrt(der_ta))/(2*a)
    if der_ta <0:
        return '方程无实数根'

Soaraa

#2 Created at ... [Delete] [Delete and Lock User]

这样子的话，der_ta ==0的时候就会出现两个一样的返回值

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