Bonjour,
56)
E = (8x + 5) * 3
E = 24x + 15
F = 4x (7 + 3x)
F = 28x + 12x²
F = 12x² + 28x
G = x (6x + 8)
G = 6x² + 8x
H = 8 (6x + 4)
H = 48x + 32
57)
A = 8 (5x - 4)
A = 40x - 32
B = - 6 (- 2x + 3)
B = 12x - 18
C = x ( - 4 + 3x)
C = - 4x + 3x²
C = 3x² - 4x
D = - 2x (5 + 7x)
D = - 10x - 14x²
D = - 14x² - 10x
58)
E = - 8 (3x - 4)
E = - 24x + 32
F = (4x - 7) * 5x
F = 20x² - 35x
G = x (- 5x + 6)
G = - 5x² + 6x
H = 6x (- 4x - 7)
H = - 24x² - 42x