$\"\"$

\

The expression is $\"\"$ .

\

Simplify the expression.

\

$\"\"$ (Original expression)

\

$\"\"$ (Rationalise by $\"\"$ )

\

$\"\"$ (Multiply)

\

$\"\"$ (Algebraic formula: $\"\"$ )

\

$\"\"$ (Difference of squares: $\"\"$ )

\

$\"\"$ (Multiply exponents)

\

$\"\"$ (Definition of $\"\"$ )

\

$\"\"$ .

\

$\"\"$

\

The simplified expression value is $\"\"$ .