The question cannot be answered because the powers of a and b, at the start of the expression are not specified.
The GCF is 1.
5b3
4x
The GCF is a.
The GCF is 2x.
The GCF is 1.
One place where this is used is to simplify fractions: you need to find the greatest common factor, then divide top and bottom by this greatest common factor.Also, in factoring expressions - you can take out the greatest common factor. For example (using "^" for power): 5x^2 + 10x has the greatest common factor 5x; so this can be taken out as a common factor, resulting in 5x(x + 2).
The GCF is 5x3
The greatest common factor of 40x2 and 20x7 is 20x2
4x
z2 = z * z * 1; z = z * 1. Greatest common factor is z.
3x
9n3
6x3
1024 = 2 to the power 10, 2187 = 3 to the power 7. There is no common factor above 1.
4c
3x
3X
The GCF is a.