OpenStudy (anonymous):

Rational Expressions: Simplify:

OpenStudy (anonymous):

OpenStudy (anonymous):

Try factoring it. \[\frac{x^{2} - 7x + 12}{x^{2} - 16} = \frac{(x - 4)(x - 3)}{(x + 4)(x - 4)} = \frac{\cancel{(x - 4)}(x - 3)}{(x + 4)\cancel{(x - 4)}} = \frac{x - 3}{x + 4}\]