Question

if a+b+c=0,then what is the value of a2 +b2+c2?​

Answer 1

Answer:

a^2 +b^2 + c^2 + 2(ab+bc+ca) = (a+b+c)^2

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

= 0 - 2(ab+bc+ca) = -2(ab+bc +ca) Ans