Réponse :
A = (x - 2)² 2e identité remarquable
A = x² - 4x + 4
B = (2x + 3)(2x - 3) 3e identité remarquable
B = 4x² - 9
C = (7x + 1)² 1e identité remarquable
C = 49x² + 14x + 1
D = (x - 7)² 2e identité remarquable
D = x² - 14x + 49
I = (x + 1)(5x - 7)
I = 5x² - 7x + 5x - 7
I = 5x² - 2x - 7
J = 5(-x + 8) - (3x - 5)
J = -5x + 40 - 3x + 5
J = -8x + 45
K = 2(x + 2) - 3(4x - 7)
K = 2x + 4 - 12x + 21
K = -10x + 25
L = (7x + 8)(2x - 1)
L = 14x² - 7x + 16x - 8
L = 14x² + 9x - 8
