Bonjour , J'ai besoin d'aide : A = 50 - ( x + 20 ) B = - ( 10 + x ) + ( x + 5) C = ( x*2 - 4x ) - ( 5x*2 + 2x - 1 ) D = - (3 - x - x*2) + ( -2x + 3x*2 -8 ) E =
Question
A = 50 - ( x + 20 )
B = - ( 10 + x ) + ( x + 5)
C = ( x*2 - 4x ) - ( 5x*2 + 2x - 1 )
D = - (3 - x - x*2) + ( -2x + 3x*2 -8 )
E = x - 4 - (2+ x ) + ( x + 5 )
F = - ( x - 8 ) + ( x -6) - ( 7- x )
2 Réponse
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1. Réponse esturova
Bonjour !
A = 50 - ( x + 20 )
A = 50 - x - 20
A = -x + 30
B = - ( 10 + x ) + ( x + 5)
B = -10 - x + x + 5
B = -5
C = ( x² - 4x ) - ( 5x² + 2x - 1 )
C = x² - 4x - 5x² - 2x + 1
C = -4x² - 6x + 1
D = - (3 - x - x²) + ( -2x + 3x² - 8 )
D = -3 + x + x² - 2x + 3x² - 8
D = 4x² - x - 11
E = x - 4 - (2 + x ) + ( x + 5 )
E = x - 4 - 2 - x + x + 5
E = x - 1
F = - ( x - 8 ) + ( x - 6) - ( 7 - x )
F = -x + 8 + x - 6 - 7 + x
F = x - 5
J'espère t'avoir aidé. Bon courage !
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2. Réponse loulakar
Réponse :
Explications étape par étape
Bonjour
A = 50 - ( x + 20 )
A = 50 - x - 20
A = 30 - x
B = - ( 10 + x ) + ( x + 5)
B = -10 - x + x + 5
B = -5
C = ( x*2 - 4x ) - ( 5x*2 + 2x - 1 )
C = x^2 - 4x - 5x^2 - 2x + 1
C= -4x^2 - 6x + 1
D = - (3 - x - x*2) + ( -2x + 3x*2 -8 )
D = -3 + x + x^2 - 2x + 3x^2 - 8
D = 4x^2 - x - 11
E = x - 4 - (2+ x ) + ( x + 5 )
E = x - 4 - 2 - x + x + 5
E = x - 1
F = - ( x - 8 ) + ( x -6) - ( 7- x )
F = - x + 8 + x - 6 - 7 + x
F = x - 5