[tex]{2x}^{2} = 1.3(8) \\ {2x}^{2} = \frac{25}{18} \\ {x}^{2} = \frac{25}{18} \times \frac{1}{2} \\ {x}^{2} = \frac{25}{36}
[/tex]
x=±5/6
4.
[tex]n = ( \sqrt{3} - \sqrt{2} ) ^{2} + ( \sqrt{6} + 1) ^{2} \\ n = 3 - 2 \sqrt{6} + 2 + 6 + 2 \sqrt{6} + 1 \\ [/tex]
n=12 ∈ Z
