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EmeliineGns
@EmeliineGns
June 2021
2
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Est-il possible de réduire ou développer [(4-x)*x]/2 ?
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nessou31
X*(-x)+x*4/2
-x^2+4x/2
-x^2+2x
0 votes
Thanks 1
limkang99
[(4-x)*x]/2= (4x-x^2)*(1/2)
=2x-1/2x^2
= -1/2x^2+2x
0 =x^2-2x (diviser par -1/2)
(=) x^2-2x+1-1=0
(=) (x+1)^2-1=0
(=) (x-1)^2=1
(=) x-1=1 ou x-1=(-1)
(=) x=2 ou 0
0 votes
Thanks 1
EmeliineGns
Wow il va falloir que je déchiffre ça mtn :')
limkang99
Je suis desolee si je t ai compliquee la vie...
EmeliineGns
Pas du tout merci beaucoup :)
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Lista de comentários
-x^2+4x/2
-x^2+2x
=2x-1/2x^2
= -1/2x^2+2x
0 =x^2-2x (diviser par -1/2)
(=) x^2-2x+1-1=0
(=) (x+1)^2-1=0
(=) (x-1)^2=1
(=) x-1=1 ou x-1=(-1)
(=) x=2 ou 0