Odpowiedź:
[tex]2\frac{11}{5}=4\frac{1}{5}[/tex]
[tex](\frac{3-\sqrt{5} }{\sqrt{2} } )^2=\frac{(3-\sqrt{5})^2 }{(\sqrt{2})^2 } =\frac{3^2-6\sqrt{5}+(\sqrt{5})^2 }{2} =\frac{9-6\sqrt{5}+5}{2} =\frac{14-6\sqrt{5}}{2} =7-3\sqrt{5}[/tex]
[tex]\frac{\sqrt{50}-\sqrt{18} }{\sqrt{2} } =\frac{\sqrt{50} }{\sqrt{2}}-\frac{\sqrt{18}}{\sqrt{2}} =\sqrt{\frac{50}{2}} -\sqrt{\frac{18}{2} } =\sqrt{25} -\sqrt{9}=5-3=2[/tex]
