Bonjour,
Développer et factoriser :
(3x+1) (-5x+4)
= - 15x² + 12x - 5x + 4
= - 15x² + 7x + 4
(3x+1) (5x+4)
= 15x² + 12x + 5x + 4
= 15x² + 17x + 4.
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Bonjour,
Développer et factoriser :
(3x+1) (-5x+4)
= - 15x² + 12x - 5x + 4
= - 15x² + 7x + 4
(3x+1) (5x+4)
= 15x² + 12x + 5x + 4
= 15x² + 17x + 4.