title: TypeError: 'float' object is not callable error with bhaskara program
body: <pre><code>#entrada de dados
  a = int(input("valor de a "))
  b = int(input("valor de b "))
  c = int(input("valor de c "))
  #
  import math
  #
  d =b*b - 4 * a * c
  #
  if d &lt; 0:
          print('nao tem raizes reais')
  elif d ==0:
          raiz = (-1*b + math.sqrt(d))/(2 * a)
          print('o valor e '), print(raiz)
  elif d &gt; 0:
          raiz = (-1*b + math.sqrt(d))(2 * a)
          raiz1 = (-1*b - math.sqrt(d))(2 * a)
          print('as raizes sao'), print(raiz), print(raiz1)
  #fim
  </code></pre>
  
  <p>I tried put this code but i got this error:</p>
  
  <blockquote>
    <p>Traceback (most recent call last):
      File "C:/Python34/test podre.py", line 16, in 
        raiz = (-1*b + math.sqrt(d))(2 * a)
    TypeError: 'float' object is not callable</p>
  </blockquote>
  
  <p>what is wrong?</p>