Question

hellpppppp preciso pra provaaaa

Answer 1

$\frac{x \sqrt{2} }{2} = \frac{ \sqrt{6} \times \sqrt{3} }{2} \\ x \sqrt{2} = \sqrt{18} \\ x \sqrt{2} = \sqrt{ {3}^{2} \times 2 } \\ x \sqrt{2} = 3 \sqrt{2} \\ x = 3$