Ответ:

  1. а) \((\sqrt{25}-\sqrt{9})^2=(5-3)^2=2^2=4\).
  2. б) \((\sqrt{10}\cdot\sqrt{11})^2=(\sqrt{110})^2=110\).
  3. в) \(\left(\frac{\sqrt{121}}{\sqrt{36}}\right)^2=\left(\frac{11}{6}\right)^2=\frac{121}{36}\).
  4. г) \(\left(\frac{\sqrt{47}}{\sqrt{6}}\right)^2=\frac{47}{6}\).