Question

radical 8-radical 18-5radical din2

Answer 1

   
[tex] \sqrt{8} - \sqrt{18} -5 \sqrt{2} = \sqrt{4\times2} - \sqrt{9\times 2} -5 \sqrt{2} =\\\\ = 2\sqrt{2} - 3\sqrt{2} -5 \sqrt{2} =\boxed{-6\sqrt{2} }[/tex]