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Lecollegedesnoobs
@Lecollegedesnoobs
May 2019
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Bonjour, j'aimerai avoir de l'aide sur un sujet en mathématiques à rendre pour demain, aidez moi svp ;-;
factoriser : (5x-7)²-100
factoriser : (2x-5)²-2(2x-5) (2x-3)
factoriser : (3x+1)(5x-4)-(5x-4)²
Merci de me répondre rapidement si possible <3
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mohamed20021
1) (5x-7)²-100= (5x-7) ²-10 ²
=(5x-7-10)(5x-7+10)
=(5x-17)(5x+3)
2) (2x-5)²-2(2x-5) (2x-3)
=(2x-5)(2x-5-2+2x-3)
=(2x-5)(4x-10)
3) (3x+1)(5x-4)-(5x-4)²
=(5x-4)(3x+1-5x+4)
=(5x-4)(-2x+5)
1 votes
Thanks 1
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Lista de comentários
=(5x-7-10)(5x-7+10)
=(5x-17)(5x+3)
2) (2x-5)²-2(2x-5) (2x-3)
=(2x-5)(2x-5-2+2x-3)
=(2x-5)(4x-10)
3) (3x+1)(5x-4)-(5x-4)²
=(5x-4)(3x+1-5x+4)
=(5x-4)(-2x+5)