Which two numbers add up to be 8 and multiply to be - 84

Righ, so negative times positive=negative

negative+positive=positive

thereofr

positive>negative

factor - 84 where the negative is smaller ex - 12 and 13, not - 14 and 10 so

-2 and 42 nope

fast forward

-6 and 14 yes

-6+14=8

so the numbers are - 6 and 14