Bonjour,
3x² + 5 = - x + 15
3 * - 2² + 5 = - (- 2) + 15
3 * 4 + 5 = 4 + 15
12 + 5 = 19
17 ≠ 19.
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Bonjour,
3x² + 5 = - x + 15
3 * - 2² + 5 = - (- 2) + 15
3 * 4 + 5 = 4 + 15
12 + 5 = 19
17 ≠ 19.