The factor pairs of 36 are (36,1)(18,2)(12,3)(9,4)(6,6)
None of them add up to 18.
18 and 18
51
-41
48
-27
Well, 18 and 3 (both factors of 36) add up to 21. As well, the factors 12 and 9 add up to 21.
The factor pairs of 36 are (36, 1) (18, 2) (12, 3) (9, 4) (6, 6) None of them add up to 9. If that was -36, you could use 12 and -3
The factor pairs of 36 are (36,1)(18,2)(12,3)(9,4) Even considering their negative counterparts, none of them adds up to -60.
It is: -6 and -6
-27
360
23