Ответ:

Используем правило \((a+b+c)^2=a^2+b^2+c^2+2ab+2ac+2bc\), учитывая знаки слагаемых.

  1. \((\sqrt{3}+\sqrt{2}+1)^2=3+2+1+2\sqrt{6}+2\sqrt{3}+2\sqrt{2}=6+2\sqrt{6}+2\sqrt{3}+2\sqrt{2}\).
  2. \((\sqrt{5}-\sqrt{2}-1)^2=5+2+1-2\sqrt{10}-2\sqrt{5}+2\sqrt{2}=8-2\sqrt{10}-2\sqrt{5}+2\sqrt{2}\).
  3. \((\sqrt{6}+\sqrt{2}-1)^2=6+2+1+2\sqrt{12}-2\sqrt{6}-2\sqrt{2}=9+4\sqrt{3}-2\sqrt{6}-2\sqrt{2}\).
  4. \((\sqrt{3}-\sqrt{2}+\sqrt{5})^2=3+2+5-2\sqrt{6}+2\sqrt{15}-2\sqrt{10}=10-2\sqrt{6}+2\sqrt{15}-2\sqrt{10}\).

Ответ: а) \(6+2\sqrt{6}+2\sqrt{3}+2\sqrt{2}\); б) \(8-2\sqrt{10}-2\sqrt{5}+2\sqrt{2}\); в) \(9+4\sqrt{3}-2\sqrt{6}-2\sqrt{2}\); г) \(10-2\sqrt{6}+2\sqrt{15}-2\sqrt{10}\).