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Bonjour, voici le calcul;
1. Quelle expression ne se simplifie pas en 3n+2
Bonjour, voici le calcul; 1. Quelle expression ne se simplifie pas en 3n+2

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2 Réponse

  • Bonjour,

    A = [tex]\frac{5n-10}{5} + 2(n+2) = n-2+2n+4=3n+2[/tex]

    B = 5(n+4) - 2(n+9) = 5n+20-2n-18=3n+2

    C = [tex]\frac{6(n+1)}{2} - 1 = 3(n+1) -1 = 3n + 3 - 2 =3n+2[/tex]

    D= 2(2n+1)-n = 4n + 2 - n = 3n+2

    E = 7(n-2) - 4(n-4) = 7n-14 - 4n + 16 = 3n+2

    F = [tex]\frac{4n+8}{2} + n - 6 = 2n + 4 +n - 6= 3n-2[/tex]

    G = [tex]\frac{9n+6}{3} = 3n + 2[/tex]

    H = n + 3 +2n -1 = 3n -2

    donc c'est la F

  • Salut !

    n + 3 + 2n - 1 = 3n + 2

    (9n + 6)/3 = 3n + 2

    (4n+8)/2 + n - 6 = 2n + 4 + n - 6 = 3n - 2

    7(n-2)-4(n-4) = 7n - 14 - 4n + 16 = 3n + 2

    2(2n+1)-n = 4n+2-n = 3n + 2

    (6(n+1))/2 - 1 = (6n+6)/2 - 1 = 3n + 3 - 1 = 3n + 2

    5(n+4)-2(n+9) = 5n + 20 - 2n - 18 = 3n + 2

    (5n-10)/5 + 2(n+2) = n - 2 + 2n + 4 = 3n + 2

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