ANSWER
The greatest common factor is 3
EXPLANATION
The given expression are
[tex]3 {h}^{5} [/tex]
and
[tex] - 6f[/tex]
We express both expressions as product of primes.
[tex]3 {h}^{5} = 3 \times {h}^{5} [/tex]
and
[tex] - 6f = - 2 \times 3 \times f[/tex]
The greatest common factor is the product of the least powers of the common factors.
The greatest common factor is 3.
