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# René Descartes

René Descartes
by

## brian greco

on 7 May 2010

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#### Transcript of René Descartes

René Descartes
By: Brian Greco Born on March 31st, 1596,
in La Haye, France. Young Life Father - Joachim - rich member of the French Parliament
Mother - Jeanne - tragically died when Rene was only one Raised by his uncle and grandmother Attended a prestigious college at age 11.
Fulfilled his fathers wish of having him
become a lawyer by getting a degree in justice
and law. How did he become a mathematician? While in Neurenburg, Germany, he claimed
to have a series of 3 life altering dreams that led
to him finding his true path in life. 1) He was blown around by a large wind while at his college campus. 2) He was awoken by a crash of lightning
and found that his stove was actually sparking. 3) He found a book of ancient Latin poets
by his bedside. He opened it and read "What
path shall I follow in life?" HUH??? Somehow, he concluded that
math and science were the keys
to true wisdom. Mathematical Contributions He spent 20+ years in the Netherlands revolutionizing math. His most famous contribution was the Cartesian Coordinate System. Descartes' Rule of Signs A way to find all of the possible
positive, negative, and
imaginary solutions to the
equation for any line.
ex. f(x)=(x^3)+(x^2)-x+1 - 2 sign changes
f(-x)=-(x^3)+(x^2)+x+1- 1 sign change

Positive Negative Imaginary

These must be even if the maximum number of solutions
for that group was even, and vice-versa.
Imaginary solutions must always be even.
There can never be a negative number of solutions. "Father of Analytical Geometry" Philosophy System of doubting that ideas or objects exist,
unless there is proof of the existence of the object/idea. Didn't trust the senses. His Death At age 53, on February 11th, 1650,
he died in Stockholm, Sweden while
visiting with the queen. Some say pneumonia killed him while
others claim a priest murdered him. If his philosophic ideas had become more
widespread, they could have led others to stop
following God. Works Referenced
Descartes Summary. (1997, December). René Descartes. Retrieved May 4, 2010,
from http://www groups.dcs.st-and.ac.uk/~history/Mathematicians/Descartes.html
René Descartes. (2010, May 4). In Wikipedia, The Free Encyclopedia. Retrieved,
May 3, 2010, from http://en.wikipedia.org/w/index.php?title=Ren%C3%A9_
Descartes&oldid=360171196
René Descartes Biography. (1997). The Biography Channel Website. Retrieved May
3, 2010, from http://www.biography.com/articles/Ren%C3%A9-Descartes-37613
Honors Received His home town of La Haye is
now named Descartes. http://www.amoeba.com/dynamic-images/blog/Charles/rene-descartes.jpg http://www.francemapxl.com/images/france-travel-map.jpg http://thebsreport.files.wordpress.com/2009/06/baby-genius-psa.jpg
http://www.wpclipart.com/weather/wind/windy_5.png http://www.insidesocal.com/prepsports/lightning.jpg http://www.women-lifestyles.com/images/MagicBook.jpg http://en.wikipedia.org/wiki/Cartesian_coordinate_system http://speak2all.files.wordpress.com/2009/03/i-think-therefore-i-am1.jpg http://www.chesapeake.va.us/services/depart/pub-util/story_of_water/images/animation/3forms.gif http://apollo.sese.asu.edu/LIW/img/20090414_img1.png http://www.ap.krakow.pl/nkja/literature/polpoet/images/rue_des1.jpg
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