Question

(a-b) (a+b) +(b-c)(b+c)+(c-a)(c+a)=0​

Answer 1

Answer:

hope it's help uh

please mark me as brainliest

Answer 2

Step-by-step explanation:

Attractive presentation: Non-verbal communication is based on visual, picture, graph, sign, etc. that can be seen very much attractive. Reducing wastage of time: The message of non-verbal communication reached the receiver very fast. For this reason, it reduces the wastage of valuable time of the communicator.