$\"\"$

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The equation is $\"\"$ .

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Square each side and eliminate the square roots.

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$\"\"$

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Subtract $\"\"$ from each side. \ \

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$\"\"$

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$\"\"$

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Add 121 to each side.

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$\"\"$

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$\"\"$

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$\"\"$

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Take square root each side.

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$\"\"$

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Evaluate square roots: $\"\"$ .

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$\"\"$

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$\"\"$

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Check:

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To check the solution, substitute $\"\"$ in $\"\"$ .

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$\"\"$

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Evaluate powers: $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Evaluate square roots: $\"\"$ .

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$\"\"$

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The solution is "True". \ \

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$\"\"$

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The solution is 11.