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NadiiaS
@NadiiaS
May 2019
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Bonsoir tout le monde !! Pouvez vous m'aider je ne comprend pas comment ce calcul a été développé, quelles sont les différents termes de l'identité remarquable ? Mercii beaucoup pour toute aide apportée :)
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scoladan
Verified answer
Bonjour,
(- b - i√|Δ|)²
= [-(b + i√|Δ|)]²
= (b + i√|Δ|)² (A + B)²
= b² + 2bi√|Δ| + i²|Δ| A² + 2AB + B²
= b² + 2bi√|Δ| - |Δ| i² = -1
Au dénominateur : (2a)² = 4a²
donc a x 1/4a² = 1/4a
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Thanks 1
NadiiaS
Ahh d'accord j'ai compris merciiii enormément tout m'a paru clair, merci encore ! :)
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Verified answer
Bonjour,(- b - i√|Δ|)²
= [-(b + i√|Δ|)]²
= (b + i√|Δ|)² (A + B)²
= b² + 2bi√|Δ| + i²|Δ| A² + 2AB + B²
= b² + 2bi√|Δ| - |Δ| i² = -1
Au dénominateur : (2a)² = 4a²
donc a x 1/4a² = 1/4a