Simple fill in the blank and example.

1. a(x+b)
2. ax+ab

example:
2(x+3)
=2.x + 2.3
=2x + 6

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.