Let's try one.
30x2y3z4 + 42x4y5z2
Do the numbers first.
Factor them.
2 x 3 x 5 = 30
2 x 3 x 7 = 42
Select the common factors.
2 x 3 = 6
For the variables, select the lowest exponents.
The GCF of the above expression is 6x2y3z2
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The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers or expressions. You have only one expression in the question! The greatest factor of any expression is itself.
The GCF is 12.
Whatever expression will lead you to the whole number 10.
Whatever expression equals 22.
7(2x + 9)