Question

add the product :a(a-b),b (b-c),c (c-a)​

Answer 1

$a ^{2} + b^{2} + c ^{2} - ab - bc - ac$

Answer 2

Your answer
a(a-b) = a^2-ab
b(b-c) = b^2-bc
c(c-a) = c^2-ac
their sum=a^2+b^2+c^2-ab-bc-ac