$\"\"$

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The logarithm equation is $\"\"$ .

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Apply product property of logarithm : $\"\"$ .

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$\"\"$

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Apply one-to-one property of logarithm function : $\"\"$ if and only if $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Check the logarithm equation at $\"\"$ .

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

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$\"\"$

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The logarithm exist at $\"\"$ .

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$\"\"$

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Check the logarithm equation at $\"\"$ .

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

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$\"\"$

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The logarithm exist at $\"\"$ .

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$\"\"$

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The values of $\"\"$ is $\"\"$ .