Simplify \(\frac{1}{x^2 + 5x + 6}\) + \(\frac{1}{x^2 + 3x + 2}\)

  • A \(\frac{x}{(x +2)(x - 3)}\)
  • B \(\frac{2}{(x + 5)(x - 3)}\)
  • C \(\frac{2}{(x + 1)(x + 3)}\)
  • D \(\frac{2}{(x - 1)(x - 3)}\)
jamb 1988mathematics

The correct answer is C. \(\frac{2}{(x + 1)(x + 3)}\)

\(\frac{1}{x^2 + 5x + 6}\) + \(\frac{1}{x^2 + 3x + 2}\) = \(\frac{1}{(x + 1)(x + 2)}\) + \(\frac{1}{(x + 1)(x + 1)}\)

\(\frac{(x + 1)+ (x + 3)}{(x + 1)(x + 2)(x + 3)}\) = \(\frac{x + 1 + x + 3}{(x + 1)(x + 2)(x + 3)}\)

\(\frac{2x + 4}{(x + 1)(x + 2)(x + 3)}\) = \(\frac{2(x + 2)}{(x + 1)(x + 2)(x + 3)}\)

= \(\frac{2}{(x + 1)(x + 3)}\)

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