Ah, what a delightful little math puzzle we have here! To find the two numbers, we can think of numbers that multiply to 18, like 2 and 9 or 3 and 6. Since we want them to add up to -9, we can see that the numbers are -3 and -6. Remember, mistakes are just happy little accidents in the world of math!
20
-17
22
137
-43
20
-17
-30
-127
17
-936
-117
-21, 27
22
137
-43
-71