(a + b)(a + b) - 2ab
Mathématiques
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Question
(a + b)(a + b) - 2ab
1 Réponse
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1. Réponse MargeSimpson1
Bjr
= (a + b)(a + b) - 2ab
= (a+b)²-2ab
= a²+2ab+b²-2ab
= a²+b²
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