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albarico20
@albarico20
January 2021
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Bonjour
Anne pretend " je peux calculer 57 au carrée- 43 au carree a l aide d une seule multiplication" comment procede t-elle ?
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ficanas06
Verified answer
A²-b² = (a+b)(a-b)
57²-43² = (57+43)(57-43) = 100 * 14 = 1400
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Verified answer
A²-b² = (a+b)(a-b)57²-43² = (57+43)(57-43) = 100 * 14 = 1400