I don't know what expressions you have to choose from, but make sure you end up with something equaling 35.
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The expression that represents the greatest common factor (gcf) of 105 and 126 is 3 x 7 but the greatest common factor of them is 21
I don't know what expressions you have to choose from, but the GCF of those numbers is 22.
The GCF is 25.
The GCF is 25.
The GCF is 5.