Answer:
Sets of numbers are ( 27,33) and (-27, -33)
Explanation;
Let the numbers be a and b.
We have their ratio is 9:11
Their difference is 6
( a - b) = 6 or (b - a ) = 6
11a - 11 b = 66 or 11b - 11a = 66
9b - 11 b = 66 or 11b -9b = 66
-2b = 66 or 2b = 66
b = -33 or b = 33
if b = -33, a = -33 + 6 = -27
if b = 33, a = 33-6 =27
So, the sets of numbers are ( 27,33) and (-27, -33)