$\"\"$

Rewrite the expression using perfect square roots.

$\"\"$

Rewrite the expression using product property of square roots;

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

$\"\"$ $\"\"$

Rewrite the ( $\"\"$ ) using imaginary unit; that is $\"\"$ where $\"\"$ .

$\"\"$

$\"\"$ (Find the square root: $\"\"$ )

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

The simplified expression is 6i.