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Anthonyviani
@Anthonyviani
April 2019
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Bonjour pouvez vous m'aider svp. merci
résoudre les équations
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Verified answer
Soit g(x)=-15x²-18x+24 et f(x)=-18x-36
f(x)=g(x) donne -15x²-18x+24=-18x-36
donc -15x²+60=0
donc x²-4=0
donc x²=4
x=-2 ou x=2
2 votes
Thanks 1
danielwenin
-15x² - 18x + 24 = 0
Δ = 1764
x1 = (18 - 42)/ -30 = -24/30 = -4/5
x2 = (18+42)/-30 = 60/-30 = -2
-18x - 36 = 0 => x = 36/-18 = -2
1 votes
Thanks 1
anthonyviani
pk des triangles ?
danielwenin
c'est le réalisant
anthonyviani
c'est le x2 x au carré ?
anthonyviani
mais dsl de cette question mais c'est quoi vos déterminant ou réalisant ?
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Verified answer
Soit g(x)=-15x²-18x+24 et f(x)=-18x-36f(x)=g(x) donne -15x²-18x+24=-18x-36
donc -15x²+60=0
donc x²-4=0
donc x²=4
x=-2 ou x=2
Δ = 1764
x1 = (18 - 42)/ -30 = -24/30 = -4/5
x2 = (18+42)/-30 = 60/-30 = -2
-18x - 36 = 0 => x = 36/-18 = -2