Bonjour vous pouvez m'aider s'il vous plait Merci beaucoup !!!!!!!!!!!!!!!!!!

E = (2x + 3)((5x - 8) - (2x - 4) (5x - 1) G = 2(x + 7) (3 - 2x) + (5x - 2)(4x +1)
F = (5x - 2) (5x - 8) - (3x - 5)(x + 7) H = 8 - x(2x + 1) - 5x(3 - 4x)

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Grade: Education Subject: mathematiques
Bonjour vous pouvez m'aider s'il vous plait Merci beaucoup !!!!!!!!!!!!!!!!!!

E = (2x + 3)((5x - 8) - (2x - 4) (5x - 1) G = 2(x + 7) (3 - 2x) + (5x - 2)(4x +1)
F = (5x - 2) (5x - 8) - (3x - 5)(x + 7) H = 8 - x(2x + 1) - 5x(3 - 4x)
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E = (2x + 3) (5x - 8) - (2x - 4) (5x - 1)
E = 2x * 5x + 2x * (- 8) + 3 * 5x + 3 * (- 8) - [2x * 5x + 2x * (- 1) - 4 * 5x - 4 * (- 1)]
E = 10x² - 16x + 15x - 24 - (10x² - 2x - 20x + 4)
E = 10x² - 16x + 15x - 24 - 10x² + 2x + 20x - 4
E = 21x - 28

F = (5x - 2) (5x - 8) - (3x - 5) (x + 7)
F = 5x * 5x + 5x * (- 8) - 2 * 5x - 2 * (- 8) - (3x * x + 3x * 7 - 5 * x - 5 * 7)
F = 25x² - 40x - 10x + 16 - (3x² + 21x - 5x - 35)
F = 25x² - 40x - 10x + 16 - 3x² - 21x + 5x + 35
F = 22x² - 66x + 51

G = 2 (x + 7) (3 - 2x) + (5x - 2) (4x + 1)
G = 2 [x * 3 + x * (- 2x) + 7 * 3 + 7 * (- 2x)] + 5x * 4x + 5x * 1 - 2 * 4x - 2 * 1
G = 2 (3x - 2x² + 21 - 14x) + 20x² + 5x - 8x - 2
G = 2 * 3x + 2 * (- 2x²) + 2 * 21 + 2 * (- 14x) + 20x² + 5x - 8x - 2
G = 6x - 4x² + 42 - 28x + 20x² + 5x - 8x - 2
G = 16x² - 25x + 40

H = 8 - x (2x + 1) - 5x (3 - 4x)
H = 8 - x * 2x - x * 1 - 5x * 3 - 5x * (- 4x)
H = 8 - 2x² - x - 15x + 20x²
H = 18x² - 16x + 8

Les * désignent "fois".