I do not know if this is suitable here:(adsbygoogle = window.adsbygoogle || []).push({});

Given that : x+y+z+xy+yz+zx=6,

Prove that x^2+y^2+z^2 >=3

Any hints will be appreciated. Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# A small problem

**Physics Forums | Science Articles, Homework Help, Discussion**