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Sagot :

NBA10

Réponse :

bonjour,

3a - 12 = 3×a - 3×4 = 3 ( a - 4 )

4y - 2 = 2×2y - 2×1 =  2 ( 2y - 1 )

6x² -2x = 3x × 2x - 2x × 1 = 2x ( 3x - 1 )

voila:)

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