polynomials and factoring

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Across
  1. 3. An expression where one perfect square is subtracted from another perfect
  2. 4. An algebraic expression that consists of three terms separated by addition or subtraction signs
  3. 7. A whole number with only two factors 1 and itself
  4. 8. The number of times a value appears in a given context
  5. 9. the highest exponent in a polynomial
Down
  1. 1. A method of writing very large or small numbers
  2. 2. A numerical factor of the term with the highest degree in a polynomial
  3. 5. An algebraic expression that consists of only one term.
  4. 6. A number or expression that divides into another number evenly
  5. 7. An expression combining variables and constants using addition, subtraction and multiplication