Réponse :
I = (2x +7)(2x - 7)
I = (2x)^2 - 7^2
I = 4x^2 - 49
T = x(7x + 5)
T = 7x^2 + 5x
B = (8x - 11)(4x - 5)
B = 32x^2 - 40x - 44x + 55
B = 32x^2 - 84x + 55
J = (3 - 2x)^2
J = 9 - 12x + (2x)^2
J = 9 - 12x + 4x^2
O = (5x - 8)(5x - 7)
O = 25x^2 - 35x - 40x + 56
O = 25x^2 - 75x + 56
A = (5x + 1)^2
A = (5x)^2 + 10x + 1
A = 25x^2 + 10x + 1
