Bonjour
A = 5 (3x - 4)
A = 15x - 20
B = - 4 (2x² - 6x + 1)
B = - 8x² + 24x - 4
C = 6 (x + 3) + 4 (5 - x)
C = 6x + 18 + 20 - 4x
C = 6x - 4x + 18 + 2
C = 2x + 20
D = 3 (x - 3) + 2 (5x - 2)
D = 3x - 9 + 10x - 4
D = 3x + 10x - 9 - 4
D = 13x - 13
E = 3 (x - 3) + 2 (5x - 2)
E = t² + 2t
F = 2/3x (x - 1) + 2/3(x - 3/4)
F = 2/3x² - 2/3x + 2/3x - 6/12x
F = 2/3x² - 6/12x
F = 2/3x² - 1/2x
G = 1/2 (x² - 1) - 2/3x (x - 3)
G = 1/2x² - 1/2 - 2/3x² + 6/3x
G = 1/2x² - 2/3x² + 6/3x - 1/2
G = 3/6x² - 4/6x² + 6/3x - 1/2
G = - 1/6x² + 6/3x - 1/2
G = - 1/6x² + 2x - 1/2
H = 1/2x (x² - 1) - 2/3x (x - 3)
H = x³/2 - 1/2x - 2/3x² + 6/3x
H = x³/2 - 2/3x² - 1/2x + 6/3x
H = x³/2 - 2/3x² - 3/6x + 12/6x
H = x³/2 - 2/3x² + 9/6x
H = x³/2 - 2/3x² + 3/2x.
