Exercice 4 : Réduire les expressions. A = 4x2 - 5x + 9 - 3x - 7x2 - 2 B = -3 + 4x - 9x2 + 5x - 2x2 + 6 C = 13x – x2 + 12 - 7x + 3x2 - 4 D = 3x - 4 - 7x2 + 4x -
Mathématiques
kelly578
Question
Exercice 4 : Réduire les expressions.
A = 4x2 - 5x + 9 - 3x - 7x2 - 2
B = -3 + 4x - 9x2 + 5x - 2x2 + 6
C = 13x – x2 + 12 - 7x + 3x2 - 4
D = 3x - 4 - 7x2 + 4x - 6
E = 2x2 - x + 4 - x2 + 4x - 5
F=-3 + 2x + x2 - 5x + 4x2 - 1
4ème merci d'avance
A = 4x2 - 5x + 9 - 3x - 7x2 - 2
B = -3 + 4x - 9x2 + 5x - 2x2 + 6
C = 13x – x2 + 12 - 7x + 3x2 - 4
D = 3x - 4 - 7x2 + 4x - 6
E = 2x2 - x + 4 - x2 + 4x - 5
F=-3 + 2x + x2 - 5x + 4x2 - 1
4ème merci d'avance
1 Réponse
-
1. Réponse nba10
Réponse :
A = 4x2 - 5x + 9 - 3x - 7x2 - 2
= 8-5x + 9 -3x -14-2
= -8x -16 + 17
= -8x +1
B = -3 + 4x - 9x2 + 5x - 2x2 + 6
= -3 +4x -18 +5x -4 +6
= -7 -18 +9x +6
= -25 + 6 +9x
= 9x -19
C = 13x – x2 + 12 - 7x + 3x2 - 4
= 13x – x² + 12 - 7x + 6 - 4
= 6x - x² + 14
D = 3x - 4 - 7x2 + 4x - 6
= 3x - 4 - 14 + 4x - 6
= 7x -24
E = 2x2 - x + 4 - x2 + 4x - 5
= 4 - x + 4 -x² + 4x - 5
= -x² +3x +3
F= -3 + 2x + x2 - 5x + 4x2 - 1
= -3 + 2x + x² - 5x + 8 - 1
= x² - 3x +4
voila:))