Answered

Bonjour es-ce quelqu'un peu m'aider j'y arrive pas svp merci.

Développer et réduire les expressions suivantes :
A = 5x(7x + 8)
B = (2x - 3)(4x + 2)
C = 3x + (2x - 3)(8x + 3)
D = 2x(4x + 5) - (6x2 - 8)
E = 5x(7 – 2x) – (6 + 2x)(3 - 8x)
F = 100x2 – 25+ (20x + 10)(2x - 4)
G = (3x – 4)2
H = (5x + 3)2
I = (3x – 9)(3x + 9)
J = (2x + 1)2 + (3x - 5)(4x – 2)
K = (4x - 1)2 – (5x - 6)2 ​

Sagot :

A = 5x(7x + 8)
A = 5x x 7x + 5x x 8
A = 35x² + 30x

B = (2x - 3)(4x + 2)
B = 2x x 4x + 2x x 2 - 3 x 4x - 3 x 2
B = 8x² + 4x - 12x - 6
B = 8x² - 8x - 6

C = jsp

D = jsp

E = jsp

F = jsp

G = jsp

H = jsp

I = (3x - 9)(3x + 9)
I = 3x² - 9 ²
I = 9x - 81

J = jsp

K = jsp