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giaosu_fanting_thientai
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[TEX]\sqrt{2x^2-2x+1}+\sqrt{2x^2-(\sqrt{3}-1)x+1}+\sqrt{2x^2+(\sqrt{3}+1)x+1}=3[/TEX]
[TEX]\sqrt{2x^2-2x+1}+\sqrt{2x^2-(\sqrt{3}-1)x+1}+\sqrt{2x^2+(\sqrt{3}+1)x+1}=3[/TEX]
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