How about -30, -1, and fifteen 1s?
Using less "friendly" numbers, an answer could be approx -0.524 and 30.524 but these are Irrational Numbers and you cannot get neat decimal representation for them.
-22
30 and -1
6
-10
8 and 2
14
-35
84
The two numbers that add to 16 and multiply to 63 are 7 and 9. This is because 7 + 9 = 16 and 7 * 9 = 63. These numbers satisfy both conditions simultaneously, making them the correct solution to the problem.
44
-18
13