$\"\"$

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The function is $\"\"$ .

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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Product rule of derivatives : $\"\"$ .

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$\"\"$

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Power rule of derivatives : $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Take out $\"\"$ as a common factor.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .