[tex] \sqrt{27} + \sqrt{12}[/tex]
[tex] \sqrt{8 - \sqrt{18} } [/tex]
[tex] \sqrt{32 - 72} [/tex]
[tex] \sqrt{45} - \sqrt{20} [/tex]


Răspuns :

Răspuns:

[tex] \sqrt{27} + \sqrt{12} = 3 \sqrt{3} + 2 \sqrt{3} = 5 \sqrt{3} \\ \sqrt{8 - \sqrt{18} } = \sqrt{8 - 3 \sqrt{2} } \\ \sqrt{32 - 72} = \sqrt{ - 40} = multimea \: vida \\ \sqrt{45} - \sqrt{20} = 3 \sqrt{5} - 2 \sqrt{5} = \sqrt{5} [/tex]