$\"\"$

The function is $\"\"$ .

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

$\"\"$

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

$\"\"$

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

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

$\"\"$ .