$\"\"$

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The absolute value of $\"\"$ is $\"\"$ .

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$\"\"$

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Squaring on each side .

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$\"\"$

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Consider $\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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The complex numbers are $\"\"$ and $\"\"$ .

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$\"\"$

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The complex numbers are $\"\"$ and $\"\"$ .