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LAETITIASEHRINE
@LAETITIASEHRINE
January 2021
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Bonjou,j'ai un devoir de mathématiques à remettre pour demain matin mais sa fait 1 semaine que je bloque dessus,merci d'avance
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MAHAM
EXO 1
a)(3x+1)²=(3x)²+2×3x×1+1²
=9x²+6x+1
b)(7-x)²=7²-2×7×x+x²
=49-14x+x²
c)(9-5x)(9+5x)
9²-(5x)²
81-25x²
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LAETITIASEHRINE
D'accord la
LAETITIASEHRINE
daccord mais j'aimerais de l'aide pour l'exercice 2 si cela ne te dérange pas merci
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Bonjour je voudrais bien de l'aide s'il' vous plait :) : 1)2/3 = 3/2 a. 2). 4-5a=2a-1 3)-1/2=-3/4t- 5/2 4) t-4=-3t-10 5) 3(x+7)=4 6)2(2-y)=-6 7)-3(2t+1)=-3(t-2) 8) 2(x+1)=3(x-1). Merci d'avance
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Bonjour,j'ai devoir en math mais je n'y comprend rien,pouvez vous m'aidez ?
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a)(3x+1)²=(3x)²+2×3x×1+1²
=9x²+6x+1
b)(7-x)²=7²-2×7×x+x²
=49-14x+x²
c)(9-5x)(9+5x)
9²-(5x)²
81-25x²