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A = 4x + 5 - (2 + x) (2 - 3)
A = 4x + 5 - [2 x 2 + 2 x (-3) + x x 2 + x x (-3)]
A = 4x + 5 - (4 - 6 + 2x - 3x)
A = 4x + 5 - 4 + 6 - 2x + 3x
A = 5x +7
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Un peu d'aide pour toi :)
A = 4x + 5 - (2 + x) (2 - 3)
A = 4x + 5 - [2 x 2 + 2 x (-3) + x x 2 + x x (-3)]
A = 4x + 5 - (4 - 6 + 2x - 3x)
A = 4x + 5 - 4 + 6 - 2x + 3x
A = 5x +7