Maths

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Across
  1. 4. Identity used in the denominator when rationalizing numbers
  2. 5. Rational numbers are either terminating, or ------
  3. 6. Amount of numbers present between any two rational numbers
  4. 7. (√a+√b) (√a-√b)
Down
  1. 1. √a*√b
  2. 2. Symbol used to represent integers (i.e. Z) comes from what word
  3. 3. √2 is an ______ number
  4. 5. 22/7 is a ______ number