Ответ:

  1. \((1-2\sqrt2)^2=1-4\sqrt2+8=9-4\sqrt2\).
  2. \((3\sqrt5+2)^2=45+12\sqrt5+4=49+12\sqrt5\).
  3. \((2\sqrt6-5\sqrt2)^2=24-20\sqrt3+50=74-20\sqrt3\).
  4. \((2\sqrt{10}-4\sqrt5)^2=40-16\sqrt{50}+80=120-32\sqrt2\).
  5. \((\sqrt{24}-2\sqrt3)^2+24\sqrt2=(2\sqrt6-2\sqrt3)^2+24\sqrt2=24-24\sqrt2+12+24\sqrt2=36\).
  6. \((\sqrt{60}+3\sqrt5)^2-60\sqrt3=(2\sqrt{15}+3\sqrt5)^2-60\sqrt3=60+60\sqrt3+45-60\sqrt3=105\).

Ответ: 1) \(9-4\sqrt2\); 2) \(49+12\sqrt5\); 3) \(74-20\sqrt3\); 4) \(120-32\sqrt2\); 5) 36; 6) 105.