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Find A and B, if:

$$\frac{3}{x^{2} - 1} = \frac{A}{x - 1} + \frac{B}{x + 1}$$

A = -$\cfrac{2}{3}$ and B = $\cfrac{2}{3}$

A = $\cfrac{2}{3}$ and B = -$\cfrac{2}{3}$

A = $\cfrac{3}{2}$ and B = -$\cfrac{3}{2}$

A = -$\cfrac{3}{2}$ and B = $\cfrac{3}{2}$