Answer:
6 and 9
Explanation:
We are given that factor pair 2 and 28,4 and 14, 6 and 9, 7 and 8.
We have to find different factor pair which does not belong with the other three.
Product of 2 and 28=

Product of 4 and 14=

Product of 6 and 9=

Product of 7 and 8=

Hence, 6 and 9 does not belongs to other three because product of 6 and 9 is different from the product of other three factors pairs.