The "C" in "GCF" stands for the word "common", meaning "same for all".
There is nothing common about a single item. "4x to the second power"
is only one number. If you're looking for common factors, then you need
at least two numbers.
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-1
If that's x2y and xy2, the GCF is xy.
The GCF is 4x.
The GCF is 5a.
2x^8 x 3x^2 x -4x = -24x^11