Answer:
17abc
Step-by-step explanation:
To find the greatest common factor between 17abc and 51a²bc, let's start by breaking down any composite number here into prime factors. 17 is prime, but 51 is composite; its prime factorization is 3 · 17. Now, let's fully expand each term:
[tex]17\cdot a\cdot b\cdot c\\3\cdot17\cdot a\cdot a\cdot b\cdot c[/tex]
The greatest common factor is the product of all the factors these terms have in common. Here, we can see that they have
in common. Multiplying these together, the greatest common factor is 17abc.