They are the complex conjugate pair (10 - 70*i) and (10 + 70*i) where i is the imaginar square root of -1. an
31
The factors of -60 that add up to 17 are 20 and -3. When you multiply 20 and -3, you get -60, and when you add them together, you get 17. Therefore, the pair of factors you are looking for is 20 and -3.
26
34
15 and 4 are the factors of 120 that add up to 19.
79
146
-13
34
115
-43
-10 and 2 -12 and 4 -20 and 12