Pouvez vous m aider SVP

bonjour
A = 6 x + 18 + 6 x² - 10 x - 9 x + 15
= 6 x² - 13 x + 33
B = 32 x + 8 - 12 x² - 3 x - x² - 2 x
= - 13 x² + 27 x + 8
c = 2 x + 1 - ( - 18 x² + 48 x + 3 x - 8 )
= 2 x + 1 + 18 x² - 51 x + 8
= 18 x² - 49 x + 9
d = 8 x - 14 x² + 14 x² - 42 x + 10 x - 30
= - 24 x - 30
E = 3 x² - 15 x + 2 x - 10 - x + 5
= 3 x² - 14 x - 5
f = 21 x² + 6 x - 24 - ( 20 x - 36 x² + 5 - 9 x )
= 21 x² + 6 x - 24 - 20 x + 36 x² - 5 + 9 x
= 57 x² - 5 x - 29
Bonsoir,
A = 6 (x + 3) + (2x - 3) (3x - 5)
A = 6x + 18 + 6x² - 10x - 9x + 15
A = 6x² + 6x - 10x - 9x + 18 + 15
A = 6x² - 13x + 33
B = (8 - 3x) (4x + 1) - x (x + 2)
B = 32x + 8 - 12x² - 3x - x² - 2x
B = - 12x² - x² + 32x - 3x - 2x + 8
B = - 13x² + 27x + 8
C = (2x + 1) - (6x - 1) (- 3x + 8)
C = 2x + 1 - (- 18x² + 48x + 3x - 8)
C = 2x + 1 + 18x² - 48x - 3x + 8
C = 18x² + 2x - 48x - 3x + 1 + 8
C = 18x² - 49x + 9
D = 2x (4 - 7x) + (7x + 5) (2x - 6)
D = 8x - 14x² + 14x² - 42x + 10x - 30
D = - 14x² + 14x² + 8x + 10x - 42x - 30
D = - 24x - 30
E = (3x + 2) (x - 5) - (x - 5)
E = 3x² - 15x + 2x - 10 - x + 5
E = 3x² - 15x - x + 2x - 10 + 5
E = 3x² - 14x - 5
F = 3 (7x² + 2x - 8) - (4x + 1) (5 - 9x)
F = 21x² + 6x - 24 - (20x - 36x² + 5 - 9x)
F = 21x² + 6x - 24 - 20x + 36x² - 5 + 9x
F = 21x² + 36x² + 6x + 9x - 20x - 24 - 5
F = 57x² - 5x - 29.