6 and -1
26
what two factors of -21 add up to -6
15
How about 3 and 6
6 and 9
60
23
Factors are multiplied, not added. The question needs to be something like, "Which two factors of thirty add up to 11?" The answer would then be 5 and 6.
146
9 and -3
They are 8 and 6