def quadratic(a, b, c):    if  isinstance(a,(int,float)) and isinstance(b,(int,float)) and isinstance(c,(int,float)):        temp=b*b-4*a*c        if temp<0:            return ('wujie')        temp1=0-b+math.sqrt(temp)        temp2=0-b-math.sqrt(temp)        x_1=temp1/(2*a)        x_2=temp2/(2*a)    return x_1,x_2