exercise(define function)

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exercise(define function)

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import math

def quadratic(a,b,c): if not isinstance(a,(int,float)) and isinstance(b,(int,float)) and isinstance(c,(int,float)): raise TypeError('bad operand type') if b2-4ac >= 0 : x1 =(-b+math.sqrt(b2-4ac))/(2a) x2 =(-b-math.sqrt(b**2-4ac))/(2a) return x1,x2 else : return '无解'

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exercise(define function)

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