Question Number 120847 by Jamshidbek2311 last updated on 03/Nov/20
$${If}\:{x},{y},{z}\:\:{then}\:{prove}\:{the}\:{following} \\ $$$${inequality} \\ $$$$\left({x}^{\mathrm{2}} +\mathrm{2}\right)\left({y}^{\mathrm{2}} +\mathrm{2}\right)\left({z}^{\mathrm{2}} +\mathrm{2}\right)=\mathrm{9}\left({xy}+{yz}+{xz}\right) \\ $$
Commented by Jamshidbek2311 last updated on 03/Nov/20
$${sorry}\:{not}\:=\:\:\:\:\:\geqslant \\ $$