second.py

Created by thomas-66

Created on May 22, 2023

920 Bytes


# Type your text here
Somme=-b/a ou x1+x2
Produit=c/a ou x1*x2
Delta=b**2-4ac
Alpha=-b/2a
Beta=-Delta/4a
a>0 parrabole vers le haut
a<0 parrabole vers le bas
Delta=0 =une racine x0=-b/2a
F.D: ax**2+bx+c
F.C: a(x-alpha)**2+Beta
F.F: a(x-x1)(x-x2)
Sommer(Alpha;Beta)

#Tableau variation
                Alpha
--------------------------
f(x)|           Beta
    |
    |

#trouver un antecedent

exemple trouver 6
8x**2+5x+6="6"

Somme utilisation
exemple:
x1=-3
b=-5
a=2
S=-b/a
S=5/2
5/2 = x1+x2 et x1=-3
5/2=-3+x2 
x2=5/2+3 =11/2
x2 = 11/2

#identite remarquable:
(a+b)**2 = a**2 + 2ab + b**2
(a-b)**2 = a**2  2ab + b**2 ; (a+b)**2
(a+b) (a-b) = a**2  b**2

#Bicarré
X**2=x**4

#Racine evidente :
si on remplace x par 1 
et que lequation est egal a 0 pour x=1 
alors c est une racine evidente

#x3
x**3 + x**2 - 10x + 8 = 0
(x-1)(x**2+2x-8)=0
2 est racine de x**2+2x-8 racine evidente
x**2+2x-8=(x-2)(x+4)

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