$\"\"$

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(a)

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The equation is $\"\"$ .

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Defintion of the logarithm function with base $\"\"$ : $\"\"$ if and only if $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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(b)

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The logarithmic equation is $\"\"$ .

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Product property of logarithm $\"\"$ .

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$\"\"$ .

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Property of natural logarithm: $\"\"$ .

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$\"\"$

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Quadratic formula: $\"\"$ .

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Here $\"\"$ , $\"\"$ and $\"\"$ .

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Substitue above values in $\"\"$

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$\"\"$

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$\"\"$ is not in the domain of the equation.

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$\"\"$ is not the solution of the equation.

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Therefore, $\"\"$ is the root of the equation.

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$\"\"$ .

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$\"\"$

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(a) $\"\"$ .

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(b) $\"\"$ .