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b= \sqrt{5-2 \sqrt{6} + \sqrt{5+2 \sqrt{6} - \sqrt{4+2 \sqrt{3}^{2}



Răspuns :

√5-2√6+√5+2√6-√4+2√3²=√5+√5-2√6+2√6-√4+2√3²=-√4+2*3=2+6=8