-45
The two numbers are -1 and -2
The two numbers that multiply to 81 and add to -18 are -9 and -9. When multiplied, they give -9 × -9 = 81, and when added, they result in -9 + -9 = -18. Thus, both conditions are satisfied with these numbers.
8 & 16
91 and 2
multiplied to seventy and add to nine is impossible, but add up to 9 and multiplied to -70, or add up to -9 and multiplied to 70 are possible. In that case, 14 and -5 would do it (or -14 and 5)
27
726
-17
The two numbers are -1 and -2
-7
Two consecutive two digit numbers that when multiplied give the product of 812 are 28 and 29.
8
-5 and -7
59
16 and 15
575
-4 and -4