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Exercice 1

x = 0

2×0-3 = -3

0²-2×0+3 = 3

2×0²-4 = -4

2×(0+4)-3 = 5

x = 1

2×1-3 = -1

1²-1×2+3 = 2

2×1²-4 = -2

2×(1+4)-3 = 7

x = 3

2×3-3 = 3

3²-2×3+3 = 6

2×3²-4 = 14

2×(3+4)-3 = 11

x = -2

2×(-2)-3 = -7

-2²-2×(-2)+3 = 3

2×-2²-4 = -12

2×(-2+4)-3 = 1