if b**2>4*a*c:
return (-b+math.sqrt(b**2-4*a*c))/(2*a),(-b-math.sqrt(b**2-4*a*c))/(2*a)
elif b**2==4*a*c:
return -b/(2*a)
else:
return '此方程无解'
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不晚睡不驼背
if b**2>4*a*c:
return (-b+math.sqrt(b**2-4*a*c))/(2*a),(-b-math.sqrt(b**2-4*a*c))/(2*a)
elif b**2==4*a*c:
return -b/(2*a)
else:
return '此方程无解'