[tex](1+\frac{2\sqrt{2}}{x+1})\frac{1}{\sqrt{x}+1}-\frac{2\sqrt{x}}{x\sqrt{x}+x+\sqrt{x}+1}) = (1+\frac{2\sqrt{2}}{x+1})\frac{1}{\sqrt{x}+1}-\frac{2\sqrt{x}}{(x+1)(\sqrt{x}+1)}) = (\frac{x+2\sqrt{2}+1}{x+1}):\frac{x-2\sqrt{x}+1}{(x+1)(\sqrt{x}+1)}=(\frac{x+2\sqrt{2}+1}{x+1}):\frac{(\sqrt{x}-1)^2}{(x+1)(\sqrt{x}+1)}[/tex]
xem lại đề nha bạn
