1 x 30, 2 x 15, 3 x 10, 5 x 6
The two numbers that multiply to -30 and add up to 13 are 15 and -2. When you multiply 15 and -2, you get -30, and when you add them together, you get 13.
The two numbers that add to 1 and multiply to -30 are 6 and -5. This can be verified as 6 + (-5) = 1 and 6 × (-5) = -30.
21
-23
5300
No two (or more) composite numbers can multiply to 30.
260
The two numbers that multiply to -30 and add up to 13 are 15 and -2. When you multiply 15 and -2, you get -30, and when you add them together, you get 13.
The two numbers are -2 and -15
61
21
-23
42
-10 and -3
5300
26
-117