Algebra II Crossword Puzzle

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Across
  1. 2. To make less complex by distribution, reduction, combining like terms, etc.
  2. 5. Any value which makes the value of a function equal to zero
  3. 6. A set of two or more equations using the same variables
  4. 9. A symbol, usually a letter, that represents one or more numbers
  5. 10. A positive, negative, or zero number
  6. 11. The point on a parabola that opens down
  7. 15. The number in front of the variable
  8. 16. The union or intersection of two events
  9. 17. A mathematical statement where two expressions are equal
  10. 18. The set of all inputs in a relation
  11. 19. A number that is not real
  12. 20. A number which can be expressed exactly as the ratio of two integers
Down
  1. 1. The set of all possible outcomes
  2. 3. An action, or trial, that has varying results
  3. 4. A matrix that consists of 1's on its main diagonal and 0's for all other elements
  4. 7. A rectangular array of numbers written within brackets
  5. 8. An arrangement of objects in which order is important
  6. 12. The value of the expression b^2-4ac for a quadratic equation
  7. 13. The form of a polynomial function when the terms are written in descending order of exponents
  8. 14. The set of all outputs of a relation