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babane48
@babane48
January 2021
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Aider moi Dm de math 4eme calcul littéral
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maudmarine
Verified answer
Bonjour,
1)
A = (2x + 7) + (3x - 6) - (- 5 + x)
A = 6x² - 12x + 21x - 42 + 5 - x
A = 6x² + 8x - 37
B = (3 - 5y) - (3 - 4y) - (- 8y - 1)
B = 3 - 5y - 3 + 4y + 8y + 1
B = 7y + 1
C = - 2 + (5 - z) + (- 3 + 6z) - ( - y - 6)
C = - 2 + 5 - z - 3 + 6z + y + 6
C = y + 5z + 6
D = - (x + 5y) - (4 - 4y) + (- 3 + y)
D = - x - 5y - 4 + 4y - 3 + y
D = - x - 2y - 7
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Verified answer
Bonjour,1)
A = (2x + 7) + (3x - 6) - (- 5 + x)
A = 6x² - 12x + 21x - 42 + 5 - x
A = 6x² + 8x - 37
B = (3 - 5y) - (3 - 4y) - (- 8y - 1)
B = 3 - 5y - 3 + 4y + 8y + 1
B = 7y + 1
C = - 2 + (5 - z) + (- 3 + 6z) - ( - y - 6)
C = - 2 + 5 - z - 3 + 6z + y + 6
C = y + 5z + 6
D = - (x + 5y) - (4 - 4y) + (- 3 + y)
D = - x - 5y - 4 + 4y - 3 + y
D = - x - 2y - 7