$\"\"$

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The equation is $\"\"$ .

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(Apply Pythagorean identity: $\"\"$ )

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$\"\"$

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$\"\"$ (Add $\"\"$ to each side)

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$\"\"$

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$\"\"$ $\"\"$

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$\"\"$ (Add 1 to each side)

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$\"\"$

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$\"\"$ (Divide each side by 2)

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$\"\"$

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$\"\"$ (Take the square root of each side)

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$\"\"$

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$\"\"$

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$\"\"$

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The solution is $\"\"$ .