l'arithmétique amusante - Hist-Math
? Correction. 1. Faux : contre-exemple 10 et 5. (10 + 5)2 = 225 et102 + 52 = 100 + 25 = 125. 2. a. Avec 10 et 5. 2 ×10 × 5 +102 + 52 = 225 = (10 + 5)2 b. 2ab + ...
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