It is not possible to give a sensible answer to this question. The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers (or expressions). Although it may not appear so, xyz + xy is only one expression.
The only common factor to all terms is yz. → xy³z² + y²z + xyz = yz(xy²z + y + x)
The GCF is xy
The GCF is xy
xy + xy = 2xy
If that's x2y and xy2, the GCF is xy.
2xy
It is an expression in the form of: xy+7
6|xy|
xy
In order to know what side of XYZ is the longest one needs more information. You need to know some of the measurements in order to solve this.
4x4y4z
You need at least two terms to find a GCF.