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Diego974
@Diego974
January 2021
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Bonjour, c'est urgent c'est pour demain pouvez-vous m'aidez s'il vous plait, merci d'avance.
tout est marqué dans le doc joint.
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maudmarine
Verified answer
Bonjour,
a) (x - 2) (3x + 1)
= 3x² + x - 6x - 2
= 3x² - 5x - 2
b) (6 - 3x) (7x - 5)
= 42x - 30 - 21x² + 15x
= - 21x² + 42x + 15x - 30
= - 21x² + 57x - 30
c) (- x + 3) (x - 3)
= - x² + 3x + 3x - 9
= - x² + 6x - 9
d) (- 2 - 3x) (- 4 - 5x)
= 8 + 10x + 12x + 15x²
= 15x² + 22x + 8
1 votes
Thanks 1
Diego974
merci bcp
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Bonjour je voudrais savoir qu'est-ce qu'un ecoquartier merci d'avance.
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Verified answer
Bonjour,a) (x - 2) (3x + 1)
= 3x² + x - 6x - 2
= 3x² - 5x - 2
b) (6 - 3x) (7x - 5)
= 42x - 30 - 21x² + 15x
= - 21x² + 42x + 15x - 30
= - 21x² + 57x - 30
c) (- x + 3) (x - 3)
= - x² + 3x + 3x - 9
= - x² + 6x - 9
d) (- 2 - 3x) (- 4 - 5x)
= 8 + 10x + 12x + 15x²
= 15x² + 22x + 8