Operations with Radicals (and Negative Radicands)

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Across
  1. 3. 2√-27
  2. 7. -5i3i
  3. 8. 2√-40 + √-12
  4. 12. √-12 + √-8
  5. 13. √-20 - √-50
  6. 14. -3i(-2i)
  7. 15. √-144
  8. 17. -6i7i
  9. 18. √-20 + √-45
Down
  1. 1. √-75 + √-12
  2. 2. 3√-18 + 2√-27
  3. 4. √-50
  4. 5. 4i(5+3i)
  5. 6. √-8 + √-32
  6. 9. √-63
  7. 10. √-45 - √-24
  8. 11. 2i(i-4)
  9. 16. √-18 - √-2