Let one number be x, the other number is (-1 - x)
Now x(-1 - x) = -6 or -x - x^2 = -6 or x^2 + x - 6 = 0 or x^2 + 3x -2x -6 = 0
Factoring we get x(x + 3) -2(x + 3) = 0 or (x -2) x (x +3) = 0 which means that either x = 2 or x = -3 and now if we take x = 2, the other number would be -3, but if we take x = -3, the other number would be 2. In either case the conditions are met. So the numbers are -3 and 2 or 2 and -3
-13
-41
-20
393
31
1
-1
Try 1 times 75.
-1
29
2 times 1 equals 2.
1 times -35 equals -35