Question

(ab+bc+ca) + ( -bc -ca -ab )

Answer 1

hey..

$= (ab + bc + ca) + ( - bc - ca - ab) \\ = ab + bc + ca - bc - ca - ab \\ = 0$

Answer 2

ANSWER FOR YOUR QUESTION:

to get the answer we should first remove the brackets in order to obtain the final solution


so ,

ab  +  bc  + ca  - bc  - ca - ab 

here  the cancelled terms would be =

+ ab and -ab
+ bc and -bc
+ ca and - ca
hence 
 the final answer is  =  0 as all the terms got cancelled

hope it helps!!!
courtesy : fire furry