Question 495579
   3(a-1)+9(2a+2)

   remove the brackets by multiplying 3 by a -1 and 9 by 2a + 2.

   3a -3 +18a +18

   collect like terms

   3a + 18a - 3 + 18

   21a + 15 ---------------ans.



I HOPE THIS HELPS..