Respuesta :
					                   B 
Distribute 9 into parentheses and 9 times 2a is 18a plus the additional 9 times 1 which gives you 18a+9
					                
					                
					             Distribute 9 into parentheses and 9 times 2a is 18a plus the additional 9 times 1 which gives you 18a+9
 
			                  