Question

if a+b+c =3√3 and a square + bsquare + csquare = 27 then prove that ab+bc+ca=0

Answer 1

Answer:

ab+bc+ca=0

Step-by-step explanation:

(a+b+c) ^2 =27

Or, a^2 +b^2 +c^2 +2(ab+bc+ca)=27

Or, 27+ 2(ab+bc+ca)=27

Or, ab+bc+ca=0