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

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The expression is $\"\"$

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According to subtraction property of equality; if $\"\"$ then $\"\"$ .

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$\"\"$ (Subtract 5 from each side)

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

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

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$\"\"$ (Divide each side by 5)

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$\"\"$ (Cancel common terms)

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

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Rewrite the ( $\"\"$ ) using imaginary unit; that is $\"\"$ where $\"\"$ .

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$\"\"$

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$\"\"$ (Find the square root: $\"\"$ ) $\"\"$

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The value of $\"\"$ .