Question

(a-b) (a+b) +(b-c) (b+c) + (c-a) (c+a) is equal
to *
i.0

ii. a ²+b² +c²

iii. ab+bc+ca

iv. a+b+c
​

Answer 1

Answer:

i) 0 is answer..

option 1st 0

Answer 2

Answer:

(a²-b²)+(b²-c²)+(c²+-a²)

a²-b²+b²-c²+c²-a²

=0