Algebra Squared

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Across
  1. 4. the highest value
  2. 5. non-varying
  3. 8. (x+y)^2
  4. 9. (blank) to the power of two
  5. 10. (first outer inner last)
  6. 11. where graph crosses the x axis
  7. 13. number or euation containing variable i
  8. 15. expression that has square root/cube root
  9. 16. numbers arranged in rows and columns
  10. 17. multiply to be "c" but add to be "b"
Down
  1. 1. noted as -1 or i
  2. 2. a point where two or more straight lines meet
  3. 3. a number times itself to equal number under radical
  4. 6. line of when graph is mirrored perfectly
  5. 7. function=nothing
  6. 12. has a single axis of reflective symmetry
  7. 13. negating the second term of a binomial
  8. 14. the lowest value