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chloebarre123
@chloebarre123
June 2021
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Bonjour, pouvez vous m'aider SVP parce que je ne comprend rien à ce QCM.
il n'est pas nécessaire de justifier.
Merci pour toute aide utile.
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harrypotter
Bonjour
(x +7) ( 11 - x ) = 0 a pour solution x = - 7 et x = - 11
3/4 - 5/4 x 1/2 = 3/4 - 5/8 = 6/8 - 5/8 = 1/ 8
0.045 s'écrit aussi 4.5 x 10 ⁻²
3 x - ( 7 x - 3) = 3 x - 7 x + 3 = - 4 x + 3
3 x( 5 x - 3) = 15 x² - 9x
( x - 4) ( x +7) - ( x - 4) ( 2 x +5) = ( x -4) ( x +7 - 2 x - 5) = ( x - 4) ( - x +2)
√180 = 6√5
si x = - 2 alors A = -3 x² = - 3( -2)² = - 12
1 votes
Thanks 1
chloebarre123
est ce que tu peux m'expliquer comment tu trouves 1) C
winner123
Verified answer
1) C
2) C
3) B
4) A
5) C
6) C
7) C
8) B
2 votes
Thanks 1
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Lista de comentários
(x +7) ( 11 - x ) = 0 a pour solution x = - 7 et x = - 11
3/4 - 5/4 x 1/2 = 3/4 - 5/8 = 6/8 - 5/8 = 1/ 8
0.045 s'écrit aussi 4.5 x 10 ⁻²
3 x - ( 7 x - 3) = 3 x - 7 x + 3 = - 4 x + 3
3 x( 5 x - 3) = 15 x² - 9x
( x - 4) ( x +7) - ( x - 4) ( 2 x +5) = ( x -4) ( x +7 - 2 x - 5) = ( x - 4) ( - x +2)
√180 = 6√5
si x = - 2 alors A = -3 x² = - 3( -2)² = - 12
Verified answer
1) C2) C
3) B
4) A
5) C
6) C
7) C
8) B