François Viète

2. Francois Viete was born in 1540 in Fontenay
le Comte, died on 23 February 1603. He was
a French mathematician and astronomer.

3. He studied and practiced law, then worked
as a teacher of science in the homes of the
nobility and royal adviser and parliamentary
(the Parliament of Brittany).

4. He dealt with algebra and trigonometry,
formulated algebra formulas, allowing to
solve quadratic equations.

5. If the quadratic equation ax² + b + c = 0 has roots x1, x2,
are:
x1 + x2 = - b/a and x1 ∙ x2 = c/a
x1, x2 – roots - pierwiastki
a, b, c - coefficient equation – współczynnik równania

6. He was the first to consistently apply the
letter symbols in algebra, although its
notation was significantly different from
currently used.

7. He was a secret adviser at the court of Henry
III and Henry IV

8. During the French-Spanish war, he broke the
enemy codes.

9.  http://forum.thesims.pl/archive/index.php/t-66267.html
 http://pl.wikipedia.org/wiki/Henryk_III_Walezy
 http://www.zamki.name/kraje/francja/henryk4.php
 http://forum.thesims.pl/archive/index.php/t-66267.html
 http://bibsy.pl/5f0WjbiI/bog-stworzyl-matematyke-diabel-dodal-do-niej-litery
 http://www.lagrangeetlhirondelle.fr/region_gb.html
 http://pl.wikipedia.org/wiki/Fran%C3%A7ois_Vi%C3%A8te

10. XX Secondary School in Gdańsk, Poland
Supervision: Agnieszka Jackiewicz
Consultation: Maria Hebel,
Jolanta Chamerska
Authors:
Bartosz Uchman, Rafał Cichocki