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LastKings45
@LastKings45
June 2021
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Résoudre dans R b ) (2x+1)(x-1)
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shanaclaes98
(2x+1)(x-1)
2x²-2x+x-1
2x²-x-1
1 votes
Thanks 1
LastKings45
Lorsque je l'ais fais j'obtenais 2x²+x-1, erreur de lecture, merci !
MrEagle
= ( 2x + 1 ) ( x - 1 )
= 2x * x + 2x * (-1) + 1 * x + 1 * (-1)
= 2x^2 - 2x + 1x - 1
= 2x^2 - 1x - 1
0 votes
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LastKings45
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2x²-2x+x-1
2x²-x-1
= 2x * x + 2x * (-1) + 1 * x + 1 * (-1)
= 2x^2 - 2x + 1x - 1
= 2x^2 - 1x - 1