[tex] a)... \\
a=4+\sqrt3\approx4+1,73=5,73\\
b=7-\sqrt2\approx7,00-1,41=5,56\\
\Rightarrow\;\fbox{a\;mai\;mare\;decat\;b}\\
\\
b)...\\
\frac{\sqrt3}{\sqrt6-2}-\frac{3}{\sqrt2}=\\
=\frac{\sqrt2*\sqrt3-3*\sqrt6+6}{\sqrt2*(\sqrt6-2)}=...\\
...=\frac{\not2(3-\sqrt6)}{\not2(\sqrt3-\sqrt2)}
[/tex]
