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if-x-y-z-gt-0-prove-that-x-2-2-y-2-2-z-2-2-9-xy-yz-zx-




Question Number 151826 by mathdanisur last updated on 23/Aug/21
if  x;y;z>0  prove that:  (x^2 +2)(y^2 +2)(z^2 +2) ≥ 9(xy+yz+zx)
$$\mathrm{if}\:\:\mathrm{x};\mathrm{y};\mathrm{z}>\mathrm{0}\:\:\mathrm{prove}\:\mathrm{that}: \\ $$$$\left(\mathrm{x}^{\mathrm{2}} +\mathrm{2}\right)\left(\mathrm{y}^{\mathrm{2}} +\mathrm{2}\right)\left(\mathrm{z}^{\mathrm{2}} +\mathrm{2}\right)\:\geqslant\:\mathrm{9}\left(\mathrm{xy}+\mathrm{yz}+\mathrm{zx}\right) \\ $$

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