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Anna957
@Anna957
May 2019
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Bonjour, je ne vois pas comment résoudre cette équation (uniquement la b) merci d’avance
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trudelmichel
Bonjour,
4(2x+5)²=0
(2x+5)²=0
2x+5=0
2x=-5
x=-5/2
x=-2.5
0 votes
Thanks 1
anna957
Merci mais dans les deux premières lignes je ne comprends pas on sont passés le 4 et le au carré
trudelmichel
4(2x+5)²=0 (2x+5)²=0/4 (2x+5)²=0 (2x+5)(2x+5)=0 2x+5=0
anna957
Merci !
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4(2x+5)²=0
(2x+5)²=0
2x+5=0
2x=-5
x=-5/2
x=-2.5