Question

Va rog!!3 si 4...................

Answer 1

${2x}^{2} = 1.3(8) \\ {2x}^{2} = \frac{25}{18} \\ {x}^{2} = \frac{25}{18} \times \frac{1}{2} \\ {x}^{2} = \frac{25}{36}$
x=±5/6

4.
$n = ( \sqrt{3} - \sqrt{2} ) ^{2} + ( \sqrt{6} + 1) ^{2} \\ n = 3 - 2 \sqrt{6} + 2 + 6 + 2 \sqrt{6} + 1$
n=12 ∈ Z