Livre du professeur - Exercices corriges
EXERCICE 4 a² ? b² = (a+b) (a?b). Exemple : A = 101² ? 99². A = (101+99)(101?99). A = 200 × 2. A = 400. B = 105² ? 95². B = (105 + 95) (105 ? 95). B = 200 × 10.
EXERCICE 4 a² ? b² = (a+b) (a?b). Exemple : A = 101² ? 99². A = (101+99)(101?99). A = 200 × 2. A = 400. B = 105² ? 95². B = (105 + 95) (105 ? 95). B = 200 × 10.