cum se fac exercițiile astea:
[tex]2 \sqrt{5} + \sqrt{5} - 4 \sqrt{5} = [/tex]
[tex] \sqrt{18} + 2 \sqrt{2} - 4 \sqrt{8} = [/tex]
[tex](2 \sqrt{2} + \sqrt{5}) \times ( \sqrt{2} - 2 \sqrt{5} ) = [/tex]
[tex]( \frac{ \sqrt{2}} { \sqrt{7} } + \frac{ \sqrt{7} }{2 \sqrt{2} } - \frac{4}{ \sqrt{14} } ) \times \frac{ \sqrt{14} }{3} [/tex]
[tex]6 \sqrt{3 } + \sqrt{3} \times ( \sqrt{3} - 2 \times (2 \sqrt{3} + \sqrt{3} \times ( \sqrt{3} - 2))) = [/tex]
[tex]( \frac{ \sqrt{2} }{2 \sqrt{3} } + \frac{ \sqrt{3} }{ \sqrt{2} } - \frac{2}{ \sqrt{6} } ) \times \frac{ \sqrt{6} }{4} = [/tex]
​