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urgentttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt urgenttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttSil vous plait pouvez vous m'aider je narrive pas a lex 7

7) Pour quelle valeur de le triangle a-t-il une aire égale à 50 cm² ?
urgentttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt urgenttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt

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  • A = (x+7)(2x-3)/2
        = 2x²-3x+14x-21/2 = 50
     
     

    ça se résouds pas comme ça au college tu dois le faire avec le tableur,

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