Bonjour BeautyLina
Exercice 1 :
A = -2x - 5 - 4x + 3
A = -6 x - 2
B = -x² + x - 3x + 5x² + 1
B = 4x² - 2 x + 1
C = -3 + 6x² + 2x - 8x² + 4 - 5x
C = -2 x² - 3 x + 1
Exercice 2 :
D = 4x - 2 - (-x² + 8x - 1)
D = 4x - 2 + x² - 8x + 1
D = x² - 4x - 1
E = (-3x + 5) + (-15 - 6x) + 7
E = -3x + 5 - 15 - 6x + 7
E = -9x - 3
F = -18 - 2x - (5x + 6) + (3 - 2x)
F = -18 - 2x - 5x - 6 + 3 - 2x
F = -9 x - 21
Exercice 3 :
G = -3(2x - 1)
G = -6 x + 3
H = (-2y + 5)y
H = -2y² + 5y
