1 x 13
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.
1 and 13
13 x 1
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.
5 times 13
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.
13*13
13 x 1
1 and 13
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.
How about: 13 times 13 = 169
5 times 13
6.5 and 2
13 and 3
338
13*31=403 13 and 31 are prime numbers.
No whole numbers, if that's what you mean, except for the trivial 1 x 13. 13 is a prime number.