23
The two numbers you are looking for are -15 and 4. When you multiply -15 and 4, you get -60, and when you add them together, you get -13.
The two numbers are -2 and -15
31
There are no such numbers but if you meant -135 then the numbers are -9 and 15
-23
5 and -3
-71
13
83
110 and -95
-13
15