Bonjour
D = 2x (4 - 5x) - (x - 7)
D = 8x - 10x² - x + 8
D = - 10x² + 7x + 8
F = (3x + 4)²
F = 9x² + 24x + 16
H = 7 + (2x - 7) (-5x - 4) + 2x
H = 7 - 10x² - 8x + 35x + 28 + 2x
H = - 10x² + 29x + 28
J = (8x + 3) (7x - 1) + 2 (3x - 5)
J = 56x² - 8x + 21x - 3 + 6x - 10
J = 56x² + 19x - 13
L = (3x + 4) (x + 2) + (5x - 1) (x - 2)
L = 3x² + 6x + 4x + 8 + 5x² - 5x - 1 + 2
L = 8x² + 5x + 9
E = (3 - 8x) - 5 (4x - 7)
E = 3 - 8x - 20x + 35
E = - 28x + 38
G = (4 - 5x) (8x + 1) - (x - 5)
G = 32x + 4 - 40x² - 5x - x + 5
G = - 40x² + 26x + 9
I = 3x - (-x + 4) (-x - 4) + x²
I = 3x - (x² + 4x - 4x - 16) + x²
I = 3x - x² + 16 + x²
I = 3x + 16
K = (-x + 1) (2x - 3) -3x (x - 7)
K = - 2x² + 3x + 2x - 3 - 3x² + 21x
I = - x² + 26x - 3
M = (2x + 3) (3x - 1) - (3x + 1) (2x - 5)
M = 6x² - 2x + 9x - 3 - (6x² - 15x + 2x - 5)
M = 6x² + 7x - 3 - 6x² + 15x - 2x + 5
M = 20x + 2.
