Pascal Triangle

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Across
  1. 5. Number that tells how many times a value is multiplied by itself
  2. 7. Product of all positive integers up to a number (n × n−1 × … × 1)
  3. 8. Expression made up of two terms joined by + or −
  4. 9. Each separate part in an expression (like 3x² or 2xy)
  5. 11. Used to calculate coefficients (nCr)
  6. 12. Last term in a binomial expansion
Down
  1. 1. Number in front of a variable in each term
  2. 2. Middle term in the expansion of (x + y)²
  3. 3. Last name of the mathematician who made the triangle of coefficients
  4. 4. Second term in the expansion of (a + b)³
  5. 6. Rule used to expand a binomial into several terms
  6. 10. Middle term in a binomial expansion