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Audrey977
@Audrey977
April 2019
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Bonjour, c pour un dm: factoriser x²-9
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Sweeties974
X²-9 = (x+3)(x-3) Il suffit de répartir le x² comme ça.
2 votes
Thanks 1
audrey977
a ok merciii
Sweeties974
Derien ^^
Commentaires (1)
X² - 9
= x² - 3²
= (x - 3)(x + 3)
1 votes
Thanks 1
audrey977
donc les solutions sont [-3;+l'infini[ ?
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= x² - 3²
= (x - 3)(x + 3)