Answer:
see explanation
Step-by-step explanation:
The factors of 24 are
± 1, ± 2, ± 3, ± 4, ± 6, ± 8, ± 12, ± 24
The factors which sum to - 4 are
+4 and - 8 = - 4
+ 8 and - 12 = - 4
That is + 4, - 8 and + 8, - 12
