Question

Упростите выражение: $\sqrt{19-2\sqrt{34} }$

Answer 1

$\sqrt{19 - 2\sqrt{34} } = \sqrt{17 - 2\sqrt{17}\sqrt{2}+2} = \sqrt{(\sqrt{17} - \sqrt{2} )^{2} } = \sqrt{17} - \sqrt{2}$