Question

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

Answer 1

it's (a+b+c)^2

It's standard formula. you can derive it if you want...

Brainlist Plz........

Answer 2

the answer is :-----

${(a + b + c)}^{2}$

hope this helps.

Plz Mark as brainliest answer