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Deadax
@Deadax
May 2019
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Bonjour pour demain j'ai la correction de mon Interro de maths et le dernier exercice me pose problème, pouvez-vous m'aider s'il vous plaît ?
ps : (C'est ce qui est après "résoudre"
Merci d'avance
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Verified answer
Bonjour,
-2x+1 = 0
-2x =-1
x =1/2
4x-1<1
4x<1+1
4x<2
x< 2/4 <1/2
x²-9+(x+3)(4-3x) =
(x-3)(x+3)+(x+3)(4-3x) = 0
(x+3)(x-3+4-3x) =0
(x+3)(-2x+1) = 0
x+3 = 0
x = -3
-2x+1 = 0
-2x =-1
x =1/2
x²-2x>0
x(x-2)>0
x>2
x>0
(2x-3)²-16<0
(2x-3-4)(2x-3+4)<0
(2x-7)(2x+1)<0
tu finis....
1 votes
Thanks 1
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Verified answer
Bonjour,-2x+1 = 0
-2x =-1
x =1/2
4x-1<1
4x<1+1
4x<2
x< 2/4 <1/2
x²-9+(x+3)(4-3x) =
(x-3)(x+3)+(x+3)(4-3x) = 0
(x+3)(x-3+4-3x) =0
(x+3)(-2x+1) = 0
x+3 = 0
x = -3
-2x+1 = 0
-2x =-1
x =1/2
x²-2x>0
x(x-2)>0
x>2
x>0
(2x-3)²-16<0
(2x-3-4)(2x-3+4)<0
(2x-7)(2x+1)<0
tu finis....