$\"\"$

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The expression is $\"\"$ .

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$\"\"$ (Substitute: a = 48 and b = 12)

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$\"\"$ (Add: $\"\"$ )

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

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

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$\"\"$ (Write $\"\"$ )

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$\"\"$ (Cancel square and root)

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$\"\"$

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The solution is $\"\"$ .

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