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Antoinebogoss20
@Antoinebogoss20
May 2019
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Bonjour à tous, je n'arrive pas à faire cette équation :
25x² + 48 - 80x = 0
Pas trop compliqué, niveau 3ème. Merci d'avance.
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trudelmichel
Verified answer
Bonjour, 25x²-80x+48=0
delta=b²-4ac
80²-4(25x48)
delta= 6400-4800=1600
racine delta=40
x=80+40/50=120/50=2.4
x=80-40/50=40/50=0.8
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Verified answer
Bonjour, 25x²-80x+48=0delta=b²-4ac
80²-4(25x48)
delta= 6400-4800=1600
racine delta=40
x=80+40/50=120/50=2.4
x=80-40/50=40/50=0.8