81
There can be no such set.
If you have only negative numbers that sum to -18 (an even number), there must be an even number of negative numbers in the set. The product of an even number of negative numbers must be positive and so cannot equal -63.
962
80
22
negative 3 and positive 4
205
962
29
-78
141
There are no two real numbers that do, but the complex numbers (2 + i) and (2 - i) will.If you want two numbers that multiply to negative 5 and add to positive 4 then: -1 and 5If you want two numbers that multiply to negative 5 and add to negative 4 then: 1 and -5
14
23
15
Multiply the numbers ignoring the signs and then add a negative sign.
80
20
22