[tex]n = \sqrt{8} ( \sqrt{2} + 1) - 2 \sqrt{2} [/tex]
[tex]n = 2 \sqrt{2} ( \sqrt{2} + 1) - 2 \sqrt{2} [/tex]
[tex]n = 2 \sqrt{4} + 2 \sqrt{2} - 2 \sqrt{2} [/tex]
[tex]n = 2 \times 2 + 0[/tex]
[tex]n = 4 + 0[/tex]
[tex]n = 4[/tex]
[tex] \sqrt{n} = \sqrt{4} = 2[/tex]