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![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
1 RG
a, [tex]\frac{1}{\sqrt{5}-2}-\frac{4}{\sqrt{5}+1}[/tex]
b, [tex]\frac{2}{\sqrt{3}+1}-\frac{1}{\sqrt{3}-2}[/tex]
c, [tex]\sqrt{8}-\sqrt{2}+\frac{1}{\sqrt{2}+1}[/tex]
a, [tex]\frac{1}{\sqrt{5}-2}-\frac{4}{\sqrt{5}+1}[/tex]
b, [tex]\frac{2}{\sqrt{3}+1}-\frac{1}{\sqrt{3}-2}[/tex]
c, [tex]\sqrt{8}-\sqrt{2}+\frac{1}{\sqrt{2}+1}[/tex]