8) (√50 − √8) · √2 =

\(\sqrt{50}=5\sqrt{2}\), \(\sqrt{8}=2\sqrt{2}\).

\((\sqrt{50}-\sqrt{8})\sqrt{2}=(5\sqrt{2}-2\sqrt{2})\sqrt{2}=3\cdot2=6\).

Ответ: \(6\)