Răspuns:
Explicație pas cu pas:
[tex]n=(\sqrt 5+\sqrt 3)(8-\sqrt{15})-(\sqrt{13}-1)^2-5(\sqrt{5}+\sqrt{3})+6\\n=8\sqrt5+8\sqrt3-\sqrt{75}-\sqrt{45}-13+2\sqrt{13}-1-5\sqrt5-5\sqrt3+6\\n=8\sqrt5+8\sqrt3-5\sqrt3-3\sqrt5-14+2\sqrt{13}-5\sqrt{5}-5\sqrt{3}+6\\n=-2\sqrt{3}+2\sqrt{13}-8[/tex]