B
bach_nien_hoa


[TEX]1, (4x-1)\sqrt{x^2 -1} = 2x^2 +2x +1[/TEX]
[TEX]2, (x+1)\sqrt{x^2 - 2x +3} = x^2 +1[/TEX]
[TEX]3, x^3 +2 = 5\sqrt[3]{5x - 2}[/TEX]
[TEX]2, (x+1)\sqrt{x^2 - 2x +3} = x^2 +1[/TEX]
[TEX]3, x^3 +2 = 5\sqrt[3]{5x - 2}[/TEX]