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ColdFox
@ColdFox
April 2022
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Bonjour,
Compléter le développement ci-dessous :
(5x + 2) * (4x - 6) = ....... x ....... ........ x ......... ....... x ....... ........ x .........
= ............. ............. ............. .............
= ....................................................
Développer les expressions suivantes :
(9x + 4) * (3x - 2) =
=
=
(8x - 3) * (2x - 7) =
=
=
Merci !
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johann4
Bonjour,(5x+2) × (4x - 6) = 5x × 4x + 5x × (-6) + 2 × 4x + 2 × (-6) = 20x² + (-30x) + 8x + (-12) = 20x² - 22x - 12(9x + 4) × (3x - 2) = 9x × 3x + 9x × (-2) + 4 × 3x + 4 × (-2) = 27x² + (-18x) + 12x + (-8) = 27x² - 6x - 8(8x - 3) × (2x - 7) = 8x × 2x + 8x × (-7) + (-3) × 2x + (-3) × (-7) = 16x² + (-56x) + (-6x) + 21 = 16x² - 62x + 21
1 votes
Thanks 1
w4w
Merci beaucoup !
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