B
bach_nien_hoa


1, [TEX] \frac{11}{x^2} - \frac{25}{(x+5)^2} = 1 [/TEX]
2, [TEX] (4-x)\sqrt{x-2} + \sqrt{7-2x} = \sqrt{85- 57x + 13x^2 - x^3}[/TEX]
2, [TEX] (4-x)\sqrt{x-2} + \sqrt{7-2x} = \sqrt{85- 57x + 13x^2 - x^3}[/TEX]
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