Ответ:

  1. a) √8 + 6/√2 = 2√2 + 3√2 = 5√2.
  2. b) √48 − 10/√3 = 4√3 − 10√3/3 = 2√3/3.
  3. c) (6 − √8)/√2 = 6/√2 − 2 = 3√2 − 2.
  4. d) (√45 − 5)/√20 = (3√5 − 5)/(2√5) = (3 − √5)/2.
  5. e) 1/√18 + 1/√32 = 1/(3√2) + 1/(4√2) = 7/(12√2) = 7√2/24.
  6. f) 2/√3 − √6/√72 = 2/√3 − 1/(2√3) = 3/(2√3) = √3/2.