$\int \frac{x \, dx}{x^2 + 4x + 5} = $

  • A
    $\frac{1}{2}\log(x^2 + 4x + 5) + 2\tan^{-1}(x) + c$
  • B
    $\frac{1}{2}\log(x^2 + 4x + 5) - \tan^{-1}(x + 2) + c$
  • C
    $\frac{1}{2}\log(x^2 + 4x + 5) + \tan^{-1}(x + 2) + c$
  • D
    $\frac{1}{2}\log(x^2 + 4x + 5) - 2\tan^{-1}(x + 2) + c$

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