10 Simplify: a(a-b)+b(b-c)+c(c-a)

 Solution:- Given a(a-b)+b(b-c)+c(c-a)

=a×a-ab+b×b-bc+c×c-ca

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

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