0
Wiki User
71
Issac Crist ∙
-15 x 4
20
-1
370
35
The factor pairs of 21 are (21, 1) (7, 3) Even considering their negative counterparts, they don't add up to -13.
47
-29
12
43
15
703
negative 6 and negative 3
57
-307
38
112