$\"\"$

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The expression is $\"\"$ .

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The values are $\"\"$ and $\"\"$ .

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

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

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

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$\"\"$ (Multiply)

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$\"\"$ (Simplify)

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

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The value of the expression is $\"\"$ .

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$\"\"$ $\"\"$ .