Question

I need help , what’s the answer ?

Answer 1

D,

Explanation:

that's because you only factorise when you have a common factor, ax-3b cannot be factorised because they have nothing in common so it is wrong to use x to factorise it. If you want to be sure that it is not factorisable, try expanding it and you'll see that you will not get the same answer.

Answer 2

I think it’s A, but correct me if I’m wrong!