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Emma3164
@Emma3164
April 2019
2
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Bonsoir, pouvez-vous m'aider car le b) me pose problème. Merci.
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guéna62
3a
16 (3-x)²
= 16*3-16x²
=48-16x²
1 votes
Thanks 1
nonotata
Bonsoir
16 -(3-x)²
16 -(9 -6x+x²)
16-9+6x-x²
-x²+6x+7
factoriser
16-(3-x)²
4² -(3-x)²
(4 -3+x)(4+3-x)
(x+1)(-x+7)
calculer f V5
-x²+6x+7
-(V5)² +6V5+7
-5 +6V5+7
6V5+2
resoudre f(x) =0
(x+1)(-x+7) =0
x+1 =0 -x+7 =0
x = -1 -x = -7
x = 7
resoudre f(x) =7
-x²+6x+7 =7
-x²+6x+7-7 =0
-x²+6x =0
x( -x+6) =0
x =0 -x+6 =0
-x = -6
x = 6
bon courage pour tes 3 autres controles
1 votes
Thanks 1
Emma3164
Merci beaucoup du temps pris pour m'aider. Bonne soirée.
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Bonjour, pouvez-vous m'aider svp, ( niveau seconde ) c'est pour demain.Merci.
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Bonjour, pouvez-vous m'aider pour ce DM svp? Merci.
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Bonjour, pouvez-vous m'aider svp? Merci :)
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Lista de comentários
16 (3-x)²
= 16*3-16x²
=48-16x²
16 -(3-x)²
16 -(9 -6x+x²)
16-9+6x-x²
-x²+6x+7
factoriser
16-(3-x)²
4² -(3-x)²
(4 -3+x)(4+3-x)
(x+1)(-x+7)
calculer f V5
-x²+6x+7
-(V5)² +6V5+7
-5 +6V5+7
6V5+2
resoudre f(x) =0
(x+1)(-x+7) =0
x+1 =0 -x+7 =0
x = -1 -x = -7
x = 7
resoudre f(x) =7
-x²+6x+7 =7
-x²+6x+7-7 =0
-x²+6x =0
x( -x+6) =0
x =0 -x+6 =0
-x = -6
x = 6
bon courage pour tes 3 autres controles