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Coraline27
@Coraline27
May 2019
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J'ai plusieurs équation auquel je n'arrive pas , je dois rendre mon dm vendredi mais je ne vois pas ma prof de maths demain il faut donc que j'ai tout bon avec votre aide
-x+2=5x-7
x(au carré) =11
x(au carré) =38
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rosiemuller2000
Verified answer
Coucou
-x+2 = 5x-7
-6x + 2 = -7
-6x = -9
x = 9/6
x= 1,5
x² = 11
x = √11 ou x= -√11
x² = 38
x = √38 ou x= -√38
voila j espere t avoir aider
0 votes
Thanks 2
coraline27
Merci de ton aide
rosiemuller2000
de rien ;)
MAHAM
Hello !!
-x+2=5x-7
-x-5x=-7-2
-6x=-9
x=9/6
x=3/2
x²=11
x²-11=0
(x)²-(√11)²=0
(x-√11)(x+√11)=0
x=√11 ou x =-√11
SR={-√11;√11}
x²=38
x²-38=0
(x)²-(√38)²=0
(x-√38)(x+√38)=0
x=√38 ou x =-√38
SR={-√38;√38}
1 votes
Thanks 0
coraline27
encore une fois tu m'as bien aidé Merci aussi
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Verified answer
Coucou-x+2 = 5x-7
-6x + 2 = -7
-6x = -9
x = 9/6
x= 1,5
x² = 11
x = √11 ou x= -√11
x² = 38
x = √38 ou x= -√38
voila j espere t avoir aider
-x+2=5x-7
-x-5x=-7-2
-6x=-9
x=9/6
x=3/2
x²=11
x²-11=0
(x)²-(√11)²=0
(x-√11)(x+√11)=0
x=√11 ou x =-√11
SR={-√11;√11}
x²=38
x²-38=0
(x)²-(√38)²=0
(x-√38)(x+√38)=0
x=√38 ou x =-√38
SR={-√38;√38}