$\"\"$

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

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The equation is $\"\"$ .

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Apply addition property of equality: Add 9 to each side.

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$\"\"$

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$\"\"$ (Apply additive identity property: 0 + 9 = 9)

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

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Apply division property of equality: Divide each side by negative 3.

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$\"\"$

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$\"\"$ (Cancel common terms)

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$\"\"$ (Divide: $\"\"$ )

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

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$\"\"$

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$\"\"$

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$\"\"$

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Rewrite the expression using product property of square roots;

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For nonnegative real numbers a and b, $\"\"$ .

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

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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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$\"\"$ (Simplify) $\"\"$

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The value of x $\"\"$ .