The Binomial Theorem : In the expansion of $\"\"$ , $\"\"$ .

The (r-1)th term is $\"\"$ .

The given term is $\"\"$ .

Compare the term $\"\"$ with (r-1)th term $\"\"$ .

$\"\"$

The y - term, $\"\"$ .

The x - term, $\"\"$ .

Find coefficient by using n = 6 and r = 4.

$\"\"$

$\"\"$ .

The binomial expansion is $\"\"$ .