Question

the sum of a(a-b), b (b-c) and c(c-a)=___​

Answer 1

Step-by-step explanation:

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

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

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