Bonsoir pouvez vous maider svp Exercice 4
On considère l’expression (x) définie par : (x) = (5x + 3)2 − 36 . 1. Calculer (x) pour x = −1 2. Développer (x). 3. Montrer que (x) = (5x − 3)(5x + 9) 4. Résoudre l’équation (5x − 3)(5x+ 9) = 0.
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