What two numbers add to equal -12 and multiply to equal -28?

One thing before we start :)

AS you can see both numbers after equation have to be negative, 
also we know that 2 same numbers have to add up to -12 and those 2 number after multiplication have to be equal -28

Some theory:

We know that any number which is not negative multiplied by negative will result in negative result, to make it more clear 



but



we have 2 unknown numbers, let's say it's and




for
for




So your answer is 2 and -14 ;)

Many things that seem threatening in the dark become welcoming when we shine light on them