The numbers are: -5 and 3
10
5 and -3
-5 and 3
3 and -5.
15
-5 and -15 because -5 + -15 equals -5 - 15 which is -20 and -5 multiplied by -15 = 75 (two negatives multiply to make a positive)
The two numbers are -2 and -15
31
65
23
There are no such numbers but if you meant -135 then the numbers are -9 and 15