7 x 7
-13
The numbers are 3 and 4
-137
-23
7 x 7
15
The two numbers that add up to -6 and multiply to -7 are -1 and 7. This is because -1 + 7 = -6 and -1 * 7 = -7. These numbers satisfy both conditions given in the question.
-13
28 and 7
7*8 = 56
7 x 11
-1
161
The numbers are 3 and 4
-137
57