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aysun59200
@aysun59200
June 2021
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Bonsoir,
J'ai un D.N.S a faire, Niveau 4em, Sur le chapitre : Calcul litérals
Exercice :
Supprimer les parenthèses puis réduire chaque expression.
(Justifiez les reponses svp j'ai pas compris ce chapitre)
a) x² - 5x + (2x² + 7x - 8)
b) (3x² - 5x - 4) - (-4x² + 7x + 5)
c) -(6x² - 3) - (3x² + 2x - 3)
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droopette
A) x² - 5x + (2x² + 7x - 8)
=x²-5x+2x²+7x-8
=3x²+2x-8
b) (3x² - 5x - 4) - (-4x² + 7x + 5)
=3x²-5x-4+4x²-7x-5
=7x²-12x-9
c) -(6x² - 3) - (3x² + 2x - 3)
=-6x²+3-3x²-2x+3
=-9x²-2x+6
1 votes
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Bonjour et joyeux noel Aidez moi svp c'est la 5eme foi que je le poste Niveau 4m
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Bonsoir, Pour demain je dois faire un debat sur les vampires et les loups garou je ne trouve pas quoi dire aidez moi s'il vous plait je passe a l'oral
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Aider moi s'il vous plait dm de math sur les statistiques
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=x²-5x+2x²+7x-8
=3x²+2x-8
b) (3x² - 5x - 4) - (-4x² + 7x + 5)
=3x²-5x-4+4x²-7x-5
=7x²-12x-9
c) -(6x² - 3) - (3x² + 2x - 3)
=-6x²+3-3x²-2x+3
=-9x²-2x+6