Answer
$12\sqrt{7}$
Work Step by Step
RECALL:
The distributive property states that for any real numbers a, b, and c:
$ac+bc=(a+b)c$
The factor common to all terms is $\sqrt{7}$.
Use the rule above to simplify and obtain:
$=(8+13-9)\sqrt{7}
\\=12\sqrt{7}$
