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√(4+2√2)+√(6-4√2)=
√(5+2√6)-√(7+4√3)+√(27-10√2)=


Răspuns :

√4+2*2+√6-4*2=√8+√-2=2√2+√-2
√5+2*6-√7+4*3+√27-10*2=√17-√19+√15