$\"\"$

The expression is $\"\"$ .

$\"\"$ (Substitute $\"\"$ )

To simplify the expression follow the order of operations: (PEMDAS)

1. Evaluate the expressions inside Brackets/Parenthesis (P).

2. Evaluate Powers/Exponents (E).

3. Multiply and/or Divide in order from left to right (MD).

4. Add and/or Subtract in order from left to right (AS).

A simple technique for remembering the order pf operations is turned into phrase

“Please Excuse My Dear Aunty Sally” $\"\"$

First operation is Evaluating powers.

$\"\"$ (Evaluate power: $\"\"$ )

Next operation is Subtraction.

$\"\"$ (Subtract: $\"\"$ )

Next operation is multipliction.

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

Next operation is division.

$\"\"$ (Divide: $\"\"$ )

$\"\"$ (The square root of $\"\"$ ) $\"\"$

The value of the expression is about 6.9.