$\"\"$

The polynomial expression is $\"\"$ .

To find the G.C.F in above binomial expression $\"\"$ .

Factors of $\"\"$ : $\"\"$ 1,2, 3, 6, 9, 18 r, r², r³.

Factors of $\"\"$ : 2, 11, 22, 242 r.

Then the GCF is 2r. $\"\"$

Combine like terms using distributive property: $\"\"$ .

$\"\"$

Apply difference of squares formula: $\"\"$ .

$\"\"$

Apply difference of squares formula: $\"\"$ .

$\"\"$ $\"\"$

The solution is $\"\"$ .