Răspuns:
[tex] \sqrt{(1 - \sqrt{2}) {}^{2} } = \sqrt{1 - 2 \sqrt{2} + 2} = \sqrt{3 - 2 \sqrt{2} } [/tex]
[tex] \sqrt{(3 - \sqrt{7} ) {}^{2} } = \sqrt{9 - 6 \sqrt{7} + 7} = \sqrt{16 - 6 \sqrt{7} } [/tex]
[tex] \sqrt{(2 - \sqrt{3} ) {}^{2} } = \sqrt{4 - 4 \sqrt{3} + 3 } = \sqrt{7 - 4 \sqrt{3} } [/tex]
