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[tex] \sqrt{54} - \sqrt{64} - \sqrt{72} = ?[/tex]
Help !!!


Răspuns :

√54=√2.3³=3√6
√64=2³=8
√72=√2³.3²=6√2
3√6-8-6√2=3√2(√3-2)-8
sau √54=7,35
√72=8,49
7,35-8-8,49=-9,14