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MatthieucolombxFeiax
@MatthieucolombxFeiax
April 2019
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Je n'arrive pas a faire cette équation:
A= -16 -20X² + 36X
en sachant que A = 0
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danielwenin
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C'est une équation du second degré : -20×^2+36× -16=0 -20 (×^2- 9/5×+ 4/5) = -20 (×^2 - 9/5× + 81/100-1/100) =-20 [(×-9/10)^2 -1/100] =-20 (×-9/10-1/10)(×-9/10 + 1/10) =-20 (× - 1)(×-8/10)
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danielwenin
pour résoudre l'équation il suffit d'égaler chaque facteur à 0 on obtient alors x=1 ou ×=0,8
winner123
merci de la leçon
danielwenin
avec plaisir chère collègue
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Verified answer
C'est une équation du second degré : -20×^2+36× -16=0 -20 (×^2- 9/5×+ 4/5) = -20 (×^2 - 9/5× + 81/100-1/100) =-20 [(×-9/10)^2 -1/100] =-20 (×-9/10-1/10)(×-9/10 + 1/10) =-20 (× - 1)(×-8/10)