$\"\"$

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The equation is $\"\"$ .

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$\"\"$ (Square each side and eleminate the square roots)

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Apply sum of perfect square formula: $\"\"$ .

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$\"\"$

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

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Apply subtraction property of equality: a = b then $\"\"$ .

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$\"\"$ (Subtract $\"\"$ from each side)

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Apply commutative property of addition: a + b = b + a.

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ ) $\"\"$

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Apply subtraction property of equality: a = b then $\"\"$ .

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$\"\"$ (Subtract 8x from each side)

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Apply commutative property of addition: a + b = b + a.

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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Combine like terms using distributive property: $\"\"$ .

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$\"\"$

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

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Apply subtraction property of equality: a = b then $\"\"$ .

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$\"\"$ (Subtract 14 from each side)

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Apply commutative property of addition: a + b = b + a.

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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

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Check:

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

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$\"\"$

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

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

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$\"\"$ (Add: 4 + 18 + 14 = 36 and 2 + 4 = 6)

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$\"\"$ (Evaluate square roots: $\"\"$ )

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The solution is "True". $\"\"$

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The value of $\"\"$ .