Question

a²+b²+c²-ab-bc-ca= .....................

Answer 1

· a²+b²+c²-ab-bc-ca = ½ • { (a-b)² + (b-c)² + (c-a)² } ≥ 0 plz give me btinalist

Answer 2

$( {a + b + c)}^{2}$
will be the answer...