Aider moi s’il vous plaît

Bonjour

identité remarquable à connaître par cœur :

(a + b)^2 = a^2 + 2ab + b^2

(a - b)^2 = a^2 - 2ab + b^2

(a - b)(a + b) = a^2 - b^2

A = (x + 3)^2

A = x^2 + 2 * x * 3 + 3^2

A = x^2 + 6x + 9

B = (3x - 4)^2

B = (3x)^2 - 2 * 3x * 4 + 4^2

B = 9x^2 - 24x + 16

C = (x - 3)(x + 3)

C = x^2 - 3^2

C = x^2 - 9

D = (2x + 3)(2x - 3)

D = (2x)^2 - 3^2

D = 4x^2 - 9

E = (4 - 3x)(3x + 4)

E = (4 - 3x)(4 + 3x)

E = 4^2 - (3x)^2

E = 16 - 9x^2

F = (2x - 3)^2 + (x + 5)(3 - x)

F = 4x^2 - 12x + 9 + x * 3 - x * x + 5 * 3 - 5 * x

F = 4x^2 - 12x + 9 + 3x - x^2 + 15 - 5x

F = 3x^2 - 14x + 24

G = (x - 3)(x + 3) - (4 - 3x)^2

G = x^2 - 9 - (16 - 24x + 9x^2)

G = x^2 - 9 - 16 + 24x - 9x^2

G = -8x^2 + 24x - 25

H = 2(x + 3) + (2x + 3)(2x - 3)

H = 2x + 6 + 4x^2 - 9

H = 4x^2 + 2x - 3