Explications étape par étape :
x -1 0 1 2 3
2x-4 -6 -4 -2 0 2
2x - 4 = 0 F F F V F
2(-1) - 4 = -2 -4 = - 6
2 * 0 - 4 = -4
2 * 1 - 4 = 2 - 4 = -2
2 * 2 - 4 = 0
2 * 3 - 4 = 6 - 4 = 2
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Explications étape par étape :
x -1 0 1 2 3
2x-4 -6 -4 -2 0 2
2x - 4 = 0 F F F V F
2(-1) - 4 = -2 -4 = - 6
2 * 0 - 4 = -4
2 * 1 - 4 = 2 - 4 = -2
2 * 2 - 4 = 0
2 * 3 - 4 = 6 - 4 = 2