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Aya937
@Aya937
April 2019
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Svp aider moi pour l'exercice
1,2,3 de la 1ère feille & 4 de la 2 emme feille
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Laurine15
Pour l'exercice 4
1) (4x+1)' + (x-2)(4x+1)
16x'+8x+1+4x'+x-8x-2 tu supprime le 8x et le -8x
20x'+x-1
0 votes
Thanks 1
aya937
1) il faut développer et réduire
aya937
2)factoriser
aya937
3) calculer E pour x : 0 , x: -1 , x: racine carre de 2 , x: 1/5
aya937
ok
aya937
pk fat supprimer le 8x et le -8x
jun
1)E=(4 x+1)^2+(x-2)(4 x+1)
=16 x^2+8 x+1+4 x^2-7 x-2
=20 x^2+ x-1
2) E=(4 x+1)(4 x+1+ x-2)
=(4 x+1)(5 x-1)
3) pour x=0 20*0^2+0-1=-1
Pour x=-1 (-4+1)(-5-1)=18
Pour x= racine2
20* racine2^2+ Racine2-1=39-racine2
Pour x=1/5 (4*1/5+1)(5*1/5-1)=(4/5+1)*0=0
1 votes
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Aider moi SVP 1) Developper et reduire a) (5x+7)(1-3x)b) 4x(-x+3) - (2x+5) (x-1)c) (y+1/5) (y-1/5)(vous pouvez mettres tout les etapes svp)
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Lista de comentários
1) (4x+1)' + (x-2)(4x+1)
16x'+8x+1+4x'+x-8x-2 tu supprime le 8x et le -8x
20x'+x-1
=16 x^2+8 x+1+4 x^2-7 x-2
=20 x^2+ x-1
2) E=(4 x+1)(4 x+1+ x-2)
=(4 x+1)(5 x-1)
3) pour x=0 20*0^2+0-1=-1
Pour x=-1 (-4+1)(-5-1)=18
Pour x= racine2
20* racine2^2+ Racine2-1=39-racine2
Pour x=1/5 (4*1/5+1)(5*1/5-1)=(4/5+1)*0=0