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Question Number 151826 by mathdanisur last updated on 23/Aug/21

$$\mathrm{if}\mathrm{x};\mathrm{y};\mathrm{z}>0\mathrm{prove}\mathrm{that}:$$ $$({\mathrm{x}}^2+2)({\mathrm{y}}^2+2)({\mathrm{z}}^2+2)⩾9(\mathrm{xy}+\mathrm{yz}+\mathrm{zx})$$

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