Question

What is the GCF of 40xy and 24x?
A. 8x
B. 4xy
C. 24x
D. 40xy

Answer 1

8x

Answer 2

Another way to do it is to write it like this:

40xy + 24x

Then ask yourself, what number can be factored out of that expression. The solution is:

8x(5y + 3)

So then, since 8x can be factored out of both, it is the GCF