Types of expressions

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Across
  1. 4. A number raised to the third power
  2. 6. the sum of the exponents of a monomial
  3. 9. Second power
  4. 11. polynomial set equal to zero
  5. 12. polynomial with three terms
  6. 13. fifth degree
  7. 14. forming a straight line
  8. 15. expression containing variables
Down
  1. 1. Using the greatest common factors of two expressions to simplify
  2. 2. subtracting one square by another
  3. 3. polynomial with two terms
  4. 5. the sum of the exponents of a polynomial
  5. 7. ax^2+bx+c
  6. 8. fourth degree
  7. 10. polynomial with one term