bonjour besoin d'aide SVP merci factoriser: A = (6x + 7)² - (4x + 3)² B = (8x + 4)² - (4x - 2)² C = (3x + 8)² - 36 D = 36 - (x + 1 )²

bonjour

A = (6x + 7)² - (4x + 3)²
 (6x+7 -4x-3)(6x+7+4x+3)
(2x+3)(10x+10)
10(2x+3)(x+1)


B = (8x + 4)² - (4x - 2)²
(8x+4-4x+2)(8x+4+4x-2)
(4x+6)(12x+2)
2(2x+3)2(6x+1)
4(2x+3)(6x+1)

C = (3x + 8)² - 36
(3x+8)² -6²
(3x+8-6)(3x+8+6)
(3x+2)(3x+14)


D = 36 - (x + 1 )²
6² -(x+1)²
(6 -x-1)(-6+x+1)
(-x+5)(x-5)

Bonjour,

A = (6x + 7)² - (4x + 3)²
A = (6x + 7 - 4x - 3) (6x + 7 + 4x + 3)
A = (6x - 4x + 7 - 3) (6x + 4x + 7 + 3)
A = (2x + 3) (10x + 10)

B = (8x + 4)² - (4x - 2)²
B = (8x + 4 - 4x + 2) (8x + 4 + 4x - 2)
B = (8x - 4x + 4 + 2) (8x + 4x + 4 - 2)
B = (4x + 6) (12x + 2)

C = (3x + 8)² - 36
C = (3x + 8)² - 6²
C = (3x + 8 + 6) (3x + 8 - 6)
C = (3x + 14) (3x + 2)

D = 36 - (x + 1 )² 
D = 6² - (x + 1)²
D = (6 - x - 1) (- 6 + x + 1)
D = (- x + 6 - 1) (x - 6 + 1)
D = (- x + 5) (x - 5)