Question

$\frac{1}{2} (2 \sqrt{2} + 4) - \sqrt{2} = 2$

Answer 1

$\frac{1}{2} * 2\sqrt{2}+ \frac{1}{2} *4 - \sqrt{2}= \\ \\ \sqrt{2} + 2 - \sqrt{2} = \boxed{2 -\ c.c.t.d.}$