Could you factor the polynomial 3ax-15a plus x-5?

Answer 1

Do you mean (3ax-15a)+(x-5)?
If so, then this is simply a matter of factoring by grouping, which you should have learned in pre-algebra.
You should show these steps in your work:
1. (3ax-15a)+(x-5)- beginning equation
2. 3a(x-5)+1(x-5)- factoring it out
3. (3a+1)(x-5)- rule of factoring by grouping
You should learn this method, because it is very simple and helps you a lot in factoring chapters.