Answer:
-1 and 1
Explanation:
To find the numbers that can evenly divide both -18 and 7, we need to determine their common factors.
1. List the factors of -18:
-18: -1, 1, -2, 2, -3, 3, -6, 6, -9, 9, -18, 18
2. List the factors of 7:
7: -1, 1, -7, 7
3. Identify the common factors of -18 and 7:
The common factors are -1 and 1.
Therefore, the numbers that can evenly divide both -18 and 7 are -1 and 1.