Bonsoir,
Il faut factoriser 49x²-9
Merci ​

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Question

Grade: Education Subject: mathematiques
Bonsoir,
Il faut factoriser 49x²-9
Merci ​
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Best Answer
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Bonsoir,

Factoriser :

= 49x²-9

= 7²x²-9

= 7²x²-3²

= (7x)²-3²

↳ Identité remarquable : a²-b² = (a-b)(a+b)

= (7x-3)(7x+3)

Bonne soirée.