Réponse :

Explications étape par étape

Bonsoir

K = 5x - (2x - 3)

K = 5x - 2x + 3

K = 3x + 3

M = 4 + 6x - (-2x + 7)

M = 4 + 6x + 2x - 7

M = 8x - 3

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

L = 3x^2 - 4x^2 + x - 5

L = -x^2 + x - 5

N = -5x - (-5x^2 + x - 1)

N = -5x + 5x^2 - x + 1

N = 5x^2 - 6x + 1