30
The factor pairs of 60 are (60,1)(30,2)(20,3)(15,4)(12,5)(10,6)
Even considering their negative counterparts, none of them add up to -30.
-17
960
13
260
Since they must total 30, and be equal, divide 30 in half. 30 divided by 2 will give you the answer.
42
-17
-117
-17
47
-30
30
962
The two numbers are -2 and -15
They are: 30*30 = 900
-23
6 and -5