Efectuați:
[tex]a) \frac{5x + 6}{ {x}^{2} - 4 } - \frac{x + 3}{x - 2} \div \frac{ {x}^{2} + 5x + 6 }{x - 2} \\ [/tex]
[tex]b) \frac{2}{x - 2} + \frac{x + 2}{x + 1} \times ( \frac{x - 1}{x + 2} - \frac{6}{x - 2} )[/tex]
Va rog!!!