Respuesta :

[tex](8 + \sqrt{5} )(8 - \sqrt{5} ) \\ 16 - 5 \\ =11[/tex]

[tex](10 + \sqrt{3} )(6 + \sqrt{2} ) \\ =60 + 6 \sqrt{3} + 10 \sqrt{2} + \sqrt{6} [/tex]