Réponse:
27² = (3×9)² = 3²×9² =9×81 = 729
48² = (50-2)² = 50²-2×50×2+2² = 2500-200+4 = 2304
59² = (60-1)² = 60² - 2×60×1 +1² = 3600-120+1 = 3481
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Réponse:
27² = (3×9)² = 3²×9² =9×81 = 729
48² = (50-2)² = 50²-2×50×2+2² = 2500-200+4 = 2304
59² = (60-1)² = 60² - 2×60×1 +1² = 3600-120+1 = 3481