$\"\"$

Rewrite the expression using perfect square roots.

$\"\"$ (The factors of 27 = 9 $\"\"$ 3)

Rewrite the expression using product property of square roots;

For nonnegative real numbers a and b, $\"\"$ .

$\"\"$

$\"\"$ (Positive square root of: $\"\"$ and $\"\"$ )

$\"\"$

The simplified expression is $\"\"$ .