Bonjour mrc de faire des espaces et vous appliquer svp : D = 2x (4 - 5x) - (x - 7) F = (3x + 4)² H = 7 + (2x - 7) (-5x - 4) + 2x J = (8x + 3) (7x - 1) + 2 (3x -

Bonjour

D = 2x (4 - 5x) - (x - 7)

D = 8x - 10x² - x + 8

D = - 10x² + 7x + 8

F = (3x + 4)²

F = 9x² + 24x + 16

H = 7 + (2x - 7) (-5x - 4) + 2x

H = 7 - 10x² - 8x + 35x + 28 + 2x

H = - 10x² + 29x + 28

J = (8x + 3) (7x - 1) + 2 (3x - 5)

J = 56x² - 8x + 21x - 3 + 6x - 10

J = 56x² + 19x - 13

L = (3x + 4) (x + 2) + (5x - 1) (x - 2)

L = 3x² + 6x + 4x + 8 + 5x² - 5x - 1 + 2

L = 8x² + 5x + 9

E = (3 - 8x) - 5 (4x - 7)

E = 3 - 8x - 20x + 35

E = - 28x + 38

G = (4 - 5x) (8x + 1) - (x - 5)

G = 32x + 4 - 40x² - 5x - x + 5

G = - 40x² + 26x + 9

I = 3x - (-x + 4) (-x - 4) + x²

I = 3x - (x² + 4x - 4x - 16) + x²

I = 3x - x² + 16 + x²

I = 3x + 16

K = (-x + 1) (2x - 3) -3x (x - 7)

K = - 2x² + 3x + 2x - 3 - 3x² + 21x

I = - x² + 26x - 3

M = (2x + 3) (3x - 1) - (3x + 1) (2x - 5)

M = 6x² - 2x + 9x - 3 - (6x² - 15x + 2x - 5)

M = 6x² + 7x - 3 - 6x² + 15x - 2x + 5

M = 20x + 2.