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Développer et réduis chaque expression

A = 2 (x+6) - x

B = 8 + 2y - 5 (2y - 6) + 4

C = 3x + 5x (4 -2x ) - 2 (x² - 3x + 5)

D = 8 + 2x - 2x ( 3x - 4 ) + 5x ( 3 - x )

E = 7y + 4 ( 3y - 6 ) + 3 + 2 ( 3y - 7 )

MERCII ​

Sagot :

Bonjour

Développer et réduire chaque expression

A = 2 (x+6) - x

A = 2x + 12 - x

A = x + 12

B = 8 + 2y - 5 (2y - 6) + 4

B = 8 + 2y - 10y + 30 + 4

B = - 8y + 42

C = 3x + 5x (4 -2x ) - 2 (x² - 3x + 5)

C = 3x + 20x - 10x² - 2x² + 6x - 10

C = - 12x² + 29x - 10

D = 8 + 2x - 2x ( 3x - 4 ) + 5x ( 3 - x )

D = 8 + 2x - 6x² + 8x + 15x - 5x²

D = - 11x² + 25x + 8

 

E = 7y + 4 ( 3y - 6 ) + 3 + 2 ( 3y - 7 )

E = 7y + 12y - 24 + 3 + 6y - 14

E = 25y - 35.

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