# Prerequisites - Review Exercises - Page 64: 97

$\frac{x - 4}{(x + 4)(x + 3)}$

#### Work Step by Step

$x^{2} - 7x + 12$ can be factored to (x - 4)(x - 3) $x^{2} + 8x + 16$ can be factored to (x + 4) (x + 4) $x^{2} - 9$ can be factored to (x + 3)(x - 3) The problem can be simplified to: $(\frac{(x - 4)(x - 3)}{(x + 4)(x + 4)})$$(\frac{x + 4}{(x + 3)(x - 3)})$ = $\frac{x - 4}{(x + 4)(x + 3)}$

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