Răspuns:
[tex](2 + \sqrt{3 } ) {}^{2} = 4 + 4 \sqrt{3} + 3 = 7 + 4 \sqrt{3} [/tex]
[tex](1 + \sqrt{2} ) {}^{2} = 1 + 2 \sqrt{2} + 2 = 3 + 2 \sqrt{2} [/tex]
[tex]( \sqrt{5} + 2) {}^{2} = 5 + 4 \sqrt{5} + 4 = 9 + 4 \sqrt{5} [/tex]
[tex](2 \sqrt{3} + 1)^{2} = 12 + 4 \sqrt{3 } + 1 = 13 + 4 \sqrt{3} [/tex]
