February 2021 0 51 Report
Exercice 2 On considère l'expression A = (x - 1)(2x + 3) + (x-1)²

1) Montrer que A = 3x² - x - 2

2) Calculer A pour x = √2. Vous donnerez sous la forme a - √2, ou
a est un nombre entier.

3) Factoriser A.

4) Résoudre l'équation A = 0


MERCI !
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