If a and B are opposite to each other and C and D are reciprocal to each other, then 3a-2cd + 3B =?

If a and B are opposite to each other and C and D are reciprocal to each other, then 3a-2cd + 3B =?


3a-2cd+3b=3﹙a+b﹚-2cd=3×0-2=-2