Well, darling, the numbers you're looking for are 3 and 5. They multiply to 15 and add up to 8, not 4. Looks like you need to check your math before coming to me with these brain teasers.
-30
-936
17
-62 and 70
16 and -3 are the numbers which gives -48 when multiplied and 13 when added
20
-17
-30
-127
-936
-117
17
-21, 27
22
137
-43
-28