Développer en utilisant l’identité remarquable : (a + b)(a – b) = a² – b² A = (x +2)(x – 2) B = (x + 3)(x – 3)x – 2) C = (3x – 1)(3x + 1) D = (2x + 1)(2x – 1) E
Mathématiques
beatricesauzay
Question
Développer en utilisant l’identité remarquable : (a + b)(a – b) = a² – b²
A = (x +2)(x – 2)
B = (x + 3)(x – 3)x – 2)
C = (3x – 1)(3x + 1)
D = (2x + 1)(2x – 1)
E = (5 + 3x)(5 – 3x)
F = (3x – 2)(3x + 2)
G = (3 + 4x)(3 – 4x)
H = (4x² + 3)(4x² – 3)
merci de votre aide
A = (x +2)(x – 2)
B = (x + 3)(x – 3)x – 2)
C = (3x – 1)(3x + 1)
D = (2x + 1)(2x – 1)
E = (5 + 3x)(5 – 3x)
F = (3x – 2)(3x + 2)
G = (3 + 4x)(3 – 4x)
H = (4x² + 3)(4x² – 3)
merci de votre aide
1 Réponse
-
1. Réponse grr12
A = x^2 - 4
B = (x^2 - 9)(x-2) = x^3 - 2x^2 - 9x + 18
C = 9x^2 - 1
D = 4x^2 - 1
E = 25 - 9x^2
F = 9x^2 - 4
G = 9 - 16x^2
H= 16x^4 - 9