Bonjour
A = - (6x - 5) + (7 - 2x)
A = - 6x + 5 + 7 - 2x
A = - 6x - 2x + 5 + 7
A = - 8x + 12
B = 3x (5 - 8x) - (x + 4)
B = 15x - 24x² - x - 4
B = - 24x² + 15x - x - 4
B = - 24x² + 14x - 4
C = (4x + 2) (9 - x)
C = 36x - 4x² + 18 - 2x
C = - 4x² + 36x - 2x + 18
C = - 4x² + 34x + 18.
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Bonjour
A = - (6x - 5) + (7 - 2x)
A = - 6x + 5 + 7 - 2x
A = - 6x - 2x + 5 + 7
A = - 8x + 12
B = 3x (5 - 8x) - (x + 4)
B = 15x - 24x² - x - 4
B = - 24x² + 15x - x - 4
B = - 24x² + 14x - 4
C = (4x + 2) (9 - x)
C = 36x - 4x² + 18 - 2x
C = - 4x² + 36x - 2x + 18
C = - 4x² + 34x + 18.