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Bonjour

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C = 2y² - 4y + 3 pour y = -1.

C = 2y²  - 4y + 3

C = 2 * - 1² - 4 * - 1 + 3

C = 2 * 1 + 4 + 3

C = 2 + 7

C = 9.

Bonjour,

C = 2y² - 4y + 3 pour y = - 1

C = 2 × (-1)² - 4 × (-1) + 3

C = 2 + 4 + 3

C = 6 + 3

C = 9

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