Răspuns:
[tex](2 + \sqrt{2} )^{2} = 4 + 4 \sqrt{2} + 2 = 6 + 4 \sqrt{2} [/tex]
[tex](2 \sqrt{2} - 3)^{2} = 8 - 12 \sqrt{2} + 9 = 17 - 12 \sqrt{2} [/tex]
[tex]6 + 4 \sqrt{2} - 17 + 12 \sqrt{2} = 16 \sqrt{2} - 11[/tex]
