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KiaraB
@KiaraB
April 2019
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Réduire : 3x-(5x-2) Développer : (x-3)(2-3x) Résoudre : -x+1=2x+9. Aidez moi svp :(
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droopette
Réduire : 3x-(5x-2)
=3x-5x+2
=-2x+2
Développer : (x-3)(2-3x)
=2x-3x²-6+9x
= -3x²+11x-6
Résoudre : -x+1=2x+9
-x-2x=9-1
-3x=8
x= -8/3
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=3x-5x+2
=-2x+2
Développer : (x-3)(2-3x)
=2x-3x²-6+9x
= -3x²+11x-6
Résoudre : -x+1=2x+9
-x-2x=9-1
-3x=8
x= -8/3