Answer :
- 9a - 6 (a + 6)
=- 9a -6a - 36
[-6a because -6 (a) is -6a]
[-36 because -6 (6) is -36]
=-9a - 6a - 36
=-3a - 36
=- 9a -6a - 36
[-6a because -6 (a) is -6a]
[-36 because -6 (6) is -36]
=-9a - 6a - 36
=-3a - 36