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Answered

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 = x - 4 - (2+ x ) + ( x + 5 )
F = - ( x - 8 ) + ( x -6) - ( 7- x )

Sagot :

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 !

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

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