Math Puzzle

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Across
  1. 2. What is this formula "y = x3" for?
  2. 8. who is the founder of quadratic equation?
  3. 9. who is the founder of coordinate geometry?
  4. 12. who is the founder of linear inequalities?
  5. 14. alternative way to solve quadratic equation
  6. 15. who is the founder of indices?
  7. 16. we can use ..... to solve length of a line segment
  8. 17. How do you solve this equation "a^m x a^n "?
  9. 18. when a^0=
  10. 19. who is the founder of graph of function?
  11. 20. what is the formula used for solving quadratic equation?
Down
  1. 1. René Descartes introduced what in the 17h century?
  2. 3. ">" this symbols means?
  3. 4. How do you solve this equation "a^m : a^n"?
  4. 5. alternative way to solve quadratic equation
  5. 6. what is this formula "y=mx+c"
  6. 7. What term did Samuel Jeake introduced in 1696
  7. 10. what formula found in 1594 bye Simon Stevin?
  8. 11. "<" this symbols means?
  9. 13. √ this symbol is a ?