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Résoudre les équations suivantes :a) 5 - 2 x = 7 + 3 x b) ( 8 x – 10 ) ( 12 – 3 x ) = 0 c) 20 x = 8 x ²d) 121 x ² = 9 e) 49 x ² + 28 x = - 4 f) 100 – 20 x + x ² = 0 g) 16 x ² + 36 = 48 x h) 81 x ² = 64 i) ( - 5 x + 9 ) ² = 25j) - 8 - x = 1 + 4 x k) ( 3 x + 2 ) ² - ( 4 x + 13 ) ² = 0 l) 9 ( 3 - x ) = x + 5 – 7 x
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JE NE COMPREND PAS CET EXERCICE : reduire ( si possible ) chaque expression : A= x + x b = x - x c = x + x + x + x + x d = 6 x - 9 x e = 3 + 5 x f =7 x ² - 11 x ² g = 7 x + 8 x² - 10 x - 3 x² h = 7 x² + 4 x - 10 x² + x i = 7 x² +2 x j = 5 + 3 x k = 18 -2 x² l = 8 x + 11 x² + 5 m = 7x + x - 8 x - 3 x + x n = - 10 x + 4 x² - 3 + 2 x - 5 x² + 20 o = -4 x² - 11 x² p = 13 x + 10x² q = 5 x - 8 + 4 x² - 9x² + 10 x r = 5 x + 7x² - x + x² MERCIII
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