Ответ:

  1. √(16,4²) = |16,4| = 16,4.
  2. √((-1,37)²) = |-1,37| = 1,37.
  3. ¼√(84²) = ¼ · |84| = ¼ · 84 = 21.
  4. −2,6√((-5)²) = −2,6 · |-5| = −2,6 · 5 = −13.
  5. √(6⁴) = √(1296) = 36.
  6. √((-11)⁴) = √(14641) = 121.