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GaraanceF
@GaraanceF
April 2019
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X au carrée - 2 est égale à (x - 2) (x+2) par rapport à la formule a au carrée - b au carrée ? Merci de répondre!
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paulitus
Salut,
la formule est a² - b² = (a + b)(a - b).
Dans ton cas, on a :
x² - 2 = x² - (√2)² = (x - √2)(x + √2)
Si tu as des questions, je reste dispo. A+
1 votes
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Lista de comentários
la formule est a² - b² = (a + b)(a - b).
Dans ton cas, on a :
x² - 2 = x² - (√2)² = (x - √2)(x + √2)
Si tu as des questions, je reste dispo. A+