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Bonjour ;Est ce que quelqu'un peut m'aider ?Merci deviné ma classe ...

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Bonjour,

14)
A = 8x + 12y
A = 4 (2x + 3y)

B = 79a - 56b
B = 7 (7a - 8b)

C = 24x+ 30y - 18z
C = 6 (4x + 5y - 2z)

D = 15xy + 30xz
D = 15x (y + 2z)

E = 2x² + 8x
E = 2x (x + 4)

F = 25x²y - 15xy²
F = 5xy (5x - 3y)

15)
A = 16x + 7 - 9x + 2
A = 16x - 9x + 7 + 2
A = 6x + 9

B = 5z - 4,5 - z + 0,5
B = 5z - z - 4,5 + 0,5
B = 4z - 4

C = 5x² - 4 + 2x² - 9
C = 5x² + 2x² - 4 - 9
C = 7x² - 13

D = 6x + 8x² - 9x - x²
D = 8x² - x² + 6x - 9x
D = 7x² - 3x

E = 9x² - xy + 7 + 4y² + 5xy - 8x² - 11
E = 9x² - 8x² - xy + 5xy + 4y² + 7 - 11
E = x² + 4y² + 4xy - 4

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