To start, 11 and 13 are both prime numbers, meaning that their only factors are themselves and one. Therefore, the only common factor between then is 1, which gets multiplied onto the final answer, but since it’s 1 it doesn’t matter.
For the variables, there’s 5 different variables: a, b, m, n, and x. The first value has a, b, and n while the second value has a, m, and x. The only overlapping variable is a, so that’s what we need to look at. Both of the values have a^2 in them (or a*a) so that’s the greatest common factor between the variables.
In the end, we multiply both the 1 and the a^2 together, which just gives us a^2 as the greatest common factor.
Hope this helps!
