Verified answer

Bonjour,

A = 2x + 5 - 4x - 11

A = 2x - 4x + 5 - 11

A = - 2x - 6

B = - 3x * 2x² - 5x + 8

B = - 6x³ - 5x + 8

A = 5 (4 - 2x) - (5x + 3)

A = 20 - 10x - 5x - 3

A = - 10x - 5x + 20 - 3

A = - 15x + 17

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

B = 8x - 6x² - 4 + 3x + 5

B = - 6x² + 8x + 3x - 4 + 5

B = - 6x² + 11x + 1

C = (3x - 1)² + 3 (2x + 3)

C = 9x² - 6x + 1 + 6x + 9

C = 9x² - 6x + 6x + 1 + 9

C = 9x² + 10

D = (5x + 2)² - 2 (3x + 2)

D = 25x² + 20x + 4 - 6x - 4

D = 25x² + 20x - 6x + 4 - 4

D = 25x² + 14x.

A = 2x - 4x = -2x

= -2x -6

Conseil : Les x ne peux pas se calculer avec les non x