Answer:
3(x-5)
Step-by-step explanation:
Factor means take out everything that is multiplied and stop when you have a sign(+ or -) Right now, there is only 1 sign, - so you pull out everything. 6x and 15. The only common thing is 3. If it was 6x and 15x, you could pull out 3x to make it 3x(2-5). So the correct answer is 3(x-5)
Hope this helps plz mark brainliest :D