Radical Crossword Puzzle

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Across
  1. 2. if "a" is a nonnegative real number, the nonnegative number "b" such that b^2=a, denoted by b=√a
  2. 3. the number under the radical sign
  3. 4. what the real number b is called
  4. 5. the symbol that we use to denote the principal square root
  5. 6. system of numbers based on adding
  6. 10. defined as i=√-1, where i^2= -1
  7. 12. "The FOIL method is a technique used to help remember the steps required to multiply two binomials."
  8. 14. what we refer to the radicand and radical sign together
  9. 16. "a function that maps the set of nonnegative real numbers onto itself"
  10. 17. tells us how many times to use the number in multiplication
  11. 20. "when squared, gives a negative result"
  12. 21. a real number that cannot be written as a simple fraction
Down
  1. 1. the product of two nth roots is the nth root of the product of the radicands
  2. 7. the opposite pair of either a+bi or a-bi
  3. 8. of i to real numbers
  4. 9. what the real number a is called
  5. 11. "real numbers are the numbers which include both rational and irrational numbers"
  6. 13. the number that the index is above
  7. 15. expressions with exponents that are rational numbers
  8. 18. "written as n√a , where n is a positive integer greater than or equal to 2"
  9. 19. the form that contains sets of real and imaginary numbers