12 and 5
The two numbers you are looking for are -15 and 4. When you multiply -15 and 4, you get -60, and when you add them together, you get -13.
83
If you've written that correctly, there aren't two whole numbers that satisfy your conditions. -30 and 2 multiply to -60, but they add to -28.
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.
-56
-56
Ten and six.
37
The two numbers that add to -16 and multiply to 60 are -10 and -6. When you add them together, -10 + (-6) equals -16. When you multiply them, -10 × -6 equals 60.
76
-56
71