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Zoroastre
@Zoroastre
May 2019
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Bonjour
Une petite factorisation à résoudre:
(x carré - 9)(2 x+ 1)-(x - 3)(2 x +1) au carré
Merci d'avance de l'explication
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slyz007
Verified answer
Bonjour
(x²-9)(2x+1)-(x-3)(2x+1)²=(x+3)
(x-3)(2x+1)
-
(x-3)(2x+1)
² car x²-9=(x+3)(x-3)
=(x-3)(2x+1)[(x+3)-(2x+1)]
=(x-3)(2x+1)(2-x)
2 votes
Thanks 1
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Verified answer
Bonjour(x²-9)(2x+1)-(x-3)(2x+1)²=(x+3)(x-3)(2x+1)-(x-3)(2x+1)² car x²-9=(x+3)(x-3)
=(x-3)(2x+1)[(x+3)-(2x+1)]
=(x-3)(2x+1)(2-x)