What adds up to -2 and multiplies to -27?

Answer 1

-29

Answer 2

The elements of a set consisting of -27 and twentyfive 1s.

ie -27*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1 = -27

and -27+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 = -2