Réponse :
(a + b)^2 = a^2 + 2ab + b^2
(a - b)^2 = a^2 - 2ab + b^2
(a - b)(a + b) = a^2 - b^2
Explications étape par étape
Bonjour
I = (2x + 1)^2
I = 4x^2 + 4x + 1
J = (4x – 3)^2
J = 16x^2 - 24x + 9
K = (3x – 1)(3x + 1)
K = 9x^2 - 1
L = (3x – 5)^2
L = 9x^2 - 30x + 25
M = (5x +9)^2
M = 25x^2 + 90x + 81
N = (2x – 0,5)^2
N = 4x^2 - 2x + 0,25
