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Sagot :

 Bonsoir,

double distributivité

(3x-2x) ( 4x-1)

3x*4x = 12x²

3x*-1 = -3x

-2x* 4x= -8x²

-2x*-1 = 2x

=>

12x² -3x -8x² +2x =

4x² -x

SKABETIX

Bonjour,

(3 - 2x)(4x - 1) = 3 × 4x + 3 × (-1) - 2x × 4x - 2x × (-1) = 12x - 3 - 8x² + 2x = -8x² + 14x - 3

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