Answer
$4\sqrt{3}$
Work Step by Step
Simplify the radicals that can still be simplified by factoring the radicand so that one of the factors is a perfect square:
$=\sqrt3+\sqrt{9(3)}
\\=\sqrt3 + \sqrt{3^2(3)}
\\=\sqrt3 + 3\sqrt3$
RECALL:
For any real numbers $a, b,$ and $c$,
$ac+bc=(a+b)c$
Use the rule above to combine like terms:
$=(1+3)\sqrt{3}
\\=4\sqrt{3}$
