Bonjou
Exercice 1
A = (8x + 5) - (6x + 2)
= 8x + 5 - 6x - 2
= 2x + 3
B = (7x - 3) - (3x - 2)
= 7x - 3 - 3x + 2
= 4x - 1
C = (9x - 6) + (-4x + 7)
= 9x - 6 - 4x + 7
= 5x + 1
D = -4x - (3x² - 2x + 8)
= -4x - 3x² + 2x - 8
= -3x² - 2x - 8
E = 8x - (3x + 5) * 2
= 8x - (2 * 3x + 2 * 5)
= 8x - (6x + 10)
= 8x - 6x - 10
= 2x - 10
F = (8x + 9) - (-3x + 4)
= 8x + 9 + 3x - 4
= 11x + 5
Exercice 2
G = (-3x + 7) - (8x - 2)
= -3x + 7 - 8x + 2
= -11x + 9
H = (8x - 2) + (6x + 4)
= 8x - 2 + 6x + 4
= 14x + 2
I = 6x² - (4x² - 3 + 5)
= 6x² - 4x² + 3 - 5
= 2x² + 3 - 5
J = 5x - (8x + 6) * 3
= 5x² - (3 * 8x + 3 * 6)
= 5x² - (24x + 18)
= 5x² - 24x - 18
K = (-8x - 2) - (3x - 8)
= -8x - 2 - 3x + 8
= 11x + 6
L = (2x - 8) + (9x + 5)
= 2x - 8 + 9x + 5
= 11x - 3
Voilà j'espère avoir pu t'aider ^^
