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a=|√3-2√7| si b=|√3+2√3|, calculati √ab supra 5 -1

Răspuns :

a=|√3-2√7|=2√7-√3
b=|√3+2√3|=√3+2√3=3√3
[tex] \sqrt{ab}= \sqrt{3\sqrt{3}*( 2\sqrt{7}-3)} \\ \frac{\sqrt{6\sqrt{21}-9\sqrt{3}}}{5}-1[/tex]