Question

: a (a - b) + b (b-c) + c (c-a)​

Answer 1

Answer:

a(a-b)+b(b-c)+c(c-a)

=a²-ab+b²-bc+c²-ca

=a²+b²+c²-ab-bc-ca          

As we know a²+b²+c²=(a+b+c)²-2ab-2bc-2ca

=(a+b+c)²-2ab-2bc-2ca-ab-bc-ca

=(a+b+c)²-3ab-3bc-3ca

Answer 2

Answer:

Step-by-step explanation:

a(a-b) + b (b-c) +c(c-a)

2a-ab +2b-bc +2c-ca

2b+2b+2c-ab-bc-ca