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Secondary II • 1yr.

Allô Prof,

Celui-ci me pose problème:

-(6abc+12cab)-(-4acb-abc)+a

Moi, j’ai fais ceci:





—(18abc)-(-5abc)+a=

18abc+abc+a

19abc+a

Mathématiques
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Explanations (1)

  • Explanation from Alloprof

    Explanation from Alloprof

    This Explanation was submitted by a member of the Alloprof team.

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    Team Alloprof • 1yr.

    Bonjour,

    Reprenons où tu as fait une erreur :

    —(18abc)-(-5abc)+a=

    —18abc + 5abc +a= (on distribue la négation)

    —13abc +a= (on additionne les termes semblables)


    Ps: Tu peux factoriser le a si l'envie te dit:

    —13abc +a= a (—13bc + 1)

    Voilà !

    Bonne journée

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