Quadratic equations

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Across
  1. 2. A relation between inputs and outputs
  2. 6. The greatest value of a graph
  3. 8. Values that make a function equal zero
  4. 10. A number multiplied by a variable
  5. 11. The U-shaped graph of a quadratic function
  6. 13. A symbol used to indicate a root
  7. 14. Where a graph crosses the x-axis
  8. 15. A value that when multiplied by itself gives the original number
Down
  1. 1. The smallest value of a graph
  2. 3. The point where a graph crosses the y-axis
  3. 4. The line of symmetry of a parabola
  4. 5. A polynomial with a degree of 2
  5. 7. The process of breaking an expression into factors
  6. 9. The highest or lowest point on a parabola
  7. 12. The solutions of a quadratic equation