List all the pairs of integers with a product of 30

The list of pairs of integers will be created by starting with the factor pairs for 30.

1 x 30
2 x 15
3 x 10 
5 x 6

Then multiply these with negative integers which will result in a positive answer. 

-1 x -30 (This means the opposite of one groups of negative 30, which is posiitve 30).
-2 x -15
-3 x -10
-5 x -6