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[tex](- \sqrt{1})^{2} [/tex]

[tex] -\sqrt{1}^{2} [/tex]



Răspuns :

[tex](-\sqrt{1})^2 =(-1)^2\cdot (\sqrt{1})^2 = 1\cdot 1 = 1 \\ \\ \sqrt{1}^2 = -(\sqrt 1)^2 = -1[/tex]