bjr
K = 5x - 2x + 3 = 3x + 3
L = 3x² - 4x² + x - 5 = -x² + x - 5
M = 4 + 6x + 2x - 7 = 8x - 3
N = -5x + 5x² - x + 1 = 5x² - 6x + 1
O = 6a + 8 - 4a - 2 = 2a + 6
P = 7b - 2 + 3b - 5 = 10b - 7
quand j'enlève des ( ), je regarde le signe devant
si " + " => je recopie
si " - " => je change les signes
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bjr
K = 5x - 2x + 3 = 3x + 3
L = 3x² - 4x² + x - 5 = -x² + x - 5
M = 4 + 6x + 2x - 7 = 8x - 3
N = -5x + 5x² - x + 1 = 5x² - 6x + 1
O = 6a + 8 - 4a - 2 = 2a + 6
P = 7b - 2 + 3b - 5 = 10b - 7
quand j'enlève des ( ), je regarde le signe devant
si " + " => je recopie
si " - " => je change les signes