Answer
$\frac{4}{a + 4}$
Work Step by Step
Factor what is common in the numerator:
$\frac{4(a + 2)}{a^2 + 6a + 8}$
Factor the denominator:
$\frac{4(a + 2)}{(a + 4)(a + 2)}$
Cancel out common factors in the numerator and denominator:
$\frac{4}{a + 4}$
