Je n'arrive pas à développer ses expressions : A(x) = (x-4)² B(x) = 4(x-1)² C(x) = 2(x+7/2)² D(x) = 2(x+3)(x-6) Et à factoriser celle-ci : E(x) = x²+3x F(x) = x

Bonjour,

A(x) = (x-4)²
A (x) = x² - 8x + 16

B(x) = 4(x-1)²
B (x) = 4 (x² - 2x + 1)
B (x) = 4x² - 8x + 4

C(x) = 2(x+7/2)²
C (x) = 2 (x² + 14/2x + 49/4)
C (x) = 2x² + 28/2x + 98/4
C (x) = 2x² + 14x + 24,5

D(x) = 2(x+3)(x-6)
D (x) = 2 (x² - 6x + 3x - 18)
D (x) = 2x² - 12x + 6x - 36
D (x) = 2x² - 6x - 36

Factoriser :

E(x) = x²+3x
E (x) = x (x + 3)

F(x) = x²+4x+4
F (x) = (2 + x)²

G(x) = 9x²-24x+16
G (x) = (3x - 4)²

H(x) = (x-4)²+(x-4)(x-5)
H (x) = (x - 4) [(x - 4) + (x - 5))
H (x) = (x - 4) (x - 4 + x - 5)
H (x) = (x - 4) (2x - 9)