hãy cho mình hay nhất nhé
$\sqrt[]{6-2\sqrt[]{\sqrt[]{2}+\sqrt[]{12}+\sqrt[]{18-\sqrt[]{128}}}}$
`=`$\sqrt[]{6-2\sqrt[]{\sqrt[]{2}+\sqrt[]{12}+(\sqrt[]{16-2\sqrt[]{32}+2)}}}$
`=`$\sqrt[]{6-2\sqrt[]{2}+\sqrt[]{12}+\sqrt[]{16}-\sqrt[]{2}}$
`=`$\sqrt[]{6-2\sqrt[]{4+2\sqrt[]{3}}}$
`=`$\sqrt[]{6-2\sqrt[]{(\sqrt[]{3}+1)²}}$
`=`$\sqrt[]{6-2\sqrt[]{3}-2}$
`=`$\sqrt[]{4-2\sqrt[]{3}}$
`=`$\sqrt[]{(\sqrt[]{3}-2\sqrt[]{3}+1)²}$
`=`$\sqrt[]{3}$ `-1`
