Math Puzzle

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