

Le second degré : lien entre la forme factorisée et le graph
Presentation
•
Mathematics
•
4th Grade
•
Practice Problem
•
Hard
Fiona Moreau
Used 6+ times
FREE Resource
12 Slides • 1 Question
1
Le second degré : lien entre la forme factorisée et le graphique

2
Comment trouver l'équation de cette parabole sous la forme d'un produit?
3
Il faut trouver la valeur de a.
1) Partir du sommet
2) Aller d'une unité vers la droite
3) Monter de 3 unités
=> a = 3
4
Il faut repérer les zéros.
-3 et -1 sont les zéros de la fonction
5
L'équation est ...
6
L'équation est ...
y = 3.(x+1).(x+3)
7
Multiple Select
Quelle est l'équation de la parabole?
2.(x + 1)2
-2.(x - 1)
-2.(x - 1)2
-2.(x +1)
8
Résous
x2 + 7x - 3 = 2
9
x2+3x−3=1
x2+3x−4=0
Δ=b2−4ac
=9+16 = 25
2 solutions : 2 a−b±Δ
Solutions : 2−27et 11
10
Factorise 1x2+3x−4
Les solutions de la slide précédente sont : 2−27et 11
La factorisation est : 1.(x+227).(x−11)
11
2 solutions :
Δ est positif
12
1 solution :
Δ vaut 0
13
0 solution :
Δ est négatif
Le second degré : lien entre la forme factorisée et le graphique

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