That would depend on their numerical values.
The GCF is Y.
GCF(Y, Y) = Y.
GCF(Y, Y) = Y.
Factor 18 and y then look for the largest common factor form both sets of factors. For example, the factors of 18 are 2,3,6,9,18 if y = 30, then its factors are 2,3,5,6,10,15,30 So the greatest common factor is 6
25xy
The greatest common factor is the lowest of the powers in this case.
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.
y4
That depends on the numerical value of Y.
divide everything by the number/variable all terms have in common. Ex: y^3-y^2-y. The gcf is y, so you would reduce it to y(y^2-y-1)
The GCF is 3.