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Maths75015
@Maths75015
April 2019
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Aide MATHEMATIQUES URGENT !!!
Résoudre les équations suivantes :
a) 25x² + 10x + 1 = 0
b) 9x - 12x + 4 = 0
c) x² + 2x + 1 = 0
d) 16x² - 8x + 1 = 0
Merci à ceux ou celles qui m'aideront ! :)
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jujus
a.(5x+1)²
b.(3x-2)²
c.(x+1)²
d.(4x-1)²
0 votes
Thanks 1
jujus
de rien
badboys852
a) 10sc + 2
badboys852
b) 6sc - 4 c) 2sc + 2 d) 8sc - 2
jujus
la b c'est 9x-12x=-3 donc -3x+4=0 et donc le résultat c'est x=1/3 désolé je me suis trompé je n'avais pas vu qu'il n'y avait pas de x² a tu vu delta ?
badboys852
A) 25sc2 + 10sc + 1 = 0
35sc3 = 0-1
35sc3 = -1
sc = -35
b) 9sc - 12sc + 4 = 0
21sc = 0 - 4
21sc = -4
sc = 21/-4
sc = -5,25
c) sc2 + 2sc + 1 = 0
3sc3 = 0 - 1
3sc3 = -1
sc = -3
d) 16sc2 - 8sc + 1 = 0
8sc3 = 0 - 1
8sc3 = -1
sc = -8
0 votes
Thanks 1
badboys852
ces "X"
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Lista de comentários
a.(5x+1)²
b.(3x-2)²
c.(x+1)²
d.(4x-1)²
35sc3 = 0-1
35sc3 = -1
sc = -35
b) 9sc - 12sc + 4 = 0
21sc = 0 - 4
21sc = -4
sc = 21/-4
sc = -5,25
c) sc2 + 2sc + 1 = 0
3sc3 = 0 - 1
3sc3 = -1
sc = -3
d) 16sc2 - 8sc + 1 = 0
8sc3 = 0 - 1
8sc3 = -1
sc = -8