algebra crossword puzzle

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Across
  1. 6. a not equal to zero,
  2. 8. a formula that gives the solutions of the general quadratic equation
  3. 10. a number which produces a specified quantity when multiplied by itself.
  4. 11. an alternate way of writing out the equation of a parabola
Down
  1. 1. a number that, when squared, has a negative result.
  2. 2. The model whose y-values are closest to the actual values
  3. 3. the way of writing the equation of a line so that the slope
  4. 4. a second-order polynomial equation in a single variable
  5. 5. a fancy way of saying "solutions" of the equation.
  6. 7. a number of the form a + bi, where a and b are real numbers
  7. 9. a function that is almost everywhere zero