Well, honey, you're looking for a couple of numbers that can play both the addition and multiplication game. The dynamic duo you need is 3 and 5. They may not be the flashiest pair, but they get the job done - adding up to 7 and multiplying to 15.
6*1
-6 and -1.
-12 and +5
-313
19
29
55
-25
-713
7
16
There is no answer, it is not possible