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4 x + 4 x² - 49
25 x² - 1 - 3 x + 4 = 25 x² - 3 x + 3
16 x² - 64 - 2 x² - 6 x = 14 x² - 6 x - 64
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bonsoir
4 x + 4 x² - 49
25 x² - 1 - 3 x + 4 = 25 x² - 3 x + 3
16 x² - 64 - 2 x² - 6 x = 14 x² - 6 x - 64