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Mel1furtado
@Mel1furtado
May 2019
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Bonjour, est-ce que quelqu'un pourrait voir si les réponses que j'ai trouvé sont correctes, svp?
Merci d'avance.
(C'est sur l'image)
A= 47x - 21x² - 20
B= x² + 4x + 4
C= 9x² - 30 + 25
D= 4x² - 9
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mohayati2006
A=(7x-4)(5-3x)
A=35x-21x²-20+12x
A=-21x²+47x-20
B=(x+2)²=x²+4x+4
C=(3x-5)²=9x²-30x+25
D=(2x-3)(2x+3)
D=4x²-9
3 votes
Thanks 1
mohayati2006
bien tu a oublié un x C (-30x)
Mel1furtado
Merciii
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A=35x-21x²-20+12x
A=-21x²+47x-20
B=(x+2)²=x²+4x+4
C=(3x-5)²=9x²-30x+25
D=(2x-3)(2x+3)
D=4x²-9