Quadratics is Radical

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Across
  1. 2. where the graph hits the horizontal
  2. 7. A+IB
  3. 9. a number which produces a specified quantity when multiplied by itself
  4. 11. an identifiable characteristic
  5. 15. An expression in algebra with three terms
  6. 17. parabola
  7. 18. an absolute quandary (3 words)
  8. 19. a multiplier or factor that measures some property
  9. 20. The absolute least
Down
  1. 1. The absolute most
  2. 3. The path of the "vomit comet"
  3. 4. to thwart
  4. 5. combining to form a complete circle (360 degrees)
  5. 6. apex
  6. 8. anchors the plants
  7. 10. the root of a quantity
  8. 12. unchanging factor
  9. 13. allows us to find solutions to many equations that do not have real number
  10. 14. a number or algebraic expression by which another is exactly divisible.
  11. 16. nothing