Answer:
im not sure , sorry... i wish i could have helped
It is answer choice A because you have to take the the GCF of each number which is 2x. Then if you were to divide the numbers by 2x you would put those numbers in the brackets.

because

and

and
Answer:
3,6,6,9 (6 is not a function and has been repeated twice)
-1,-2,-5,-7
sorry if their wrong id.rk
(-5,0) to make this easier you could use a number line and move to the left 2 places.