2xy
4xy
2xy
4xy
4xy
The GCF is 4xy.
2xy
The GCF is 2x.
2x
2xy
Since 4xy2 is a factor of 20x2y4, it is automatically the GCF.
It stays the same because it does not have any common terms. A: 6y-4xy
The difference of cubes has a formula. (4x - y)(16x2 + 4xy + y2)