Question

an+3a/an^2+6an+9a
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Answer 1

$\frac{an + 3a}{an {}^{2} + 6an + 9a} \\ \\ \frac{a \times (n + 3)}{a \times (n {}^{2} + 6n + 9)} \\ \\ \frac{a \times (n + 3)}{a \times (n + 3) {}^{2} } \\ \\ \frac{n + 3}{(n + 3) {}^{2} } \\ \\ \frac{1}{n + 3}$