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chachafrites
@chachafrites
January 2021
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salut,
pouvez vous me dire si -x[5x + 2(-x - 1)] fait bien 7x
merci d'avance
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WAFAA2000
-x[5x + 2(-x - 1)]
= -x[5x -2x -2]
=-5x^2 + 2x^2 +2x
=-3x^2 + 2x
2 votes
Thanks 1
chachafrites
ah bah merci beaucoup ça va certainement m'aider pour mon premier DST
chachafrites
meme si je suis nule en maths
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= -x[5x -2x -2]
=-5x^2 + 2x^2 +2x
=-3x^2 + 2x