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nhunhungyeuthuong


2[TEX]\sqrt{7x^3-11x^2+25x-12}= x^2+ 6x -1[/TEX]
(5-x)[TEX]\sqrt{5-x} +(x+3)\sqrt{x+3}=2\sqrt{2}[/TEX]
[TEX]2(x^2+2x+3)=\sqrt{x^3+3x^2+3x+2}[/TEX]
(5-x)[TEX]\sqrt{5-x} +(x+3)\sqrt{x+3}=2\sqrt{2}[/TEX]
[TEX]2(x^2+2x+3)=\sqrt{x^3+3x^2+3x+2}[/TEX]