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Balsimoux
@Balsimoux
April 2019
2
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Bonjour j'ai besoin que quelqu'un
vérifie
l'exercice que j'ai terminé. Merci
beaucoup
!
D =
Développer et réduire D
Factoriser D
Calculer D pour
Merci d'avance.
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lolilolade
Il manque un x a la 2e ligne c'est 7x pas 7 :)
Je pense le reste est bon !
0 votes
Thanks 1
balsimoux
Merci !!
shanaclaes98
(2x+3)²+(2x+3)(7x-2)
(4x²+12x+9)+(14x²-4x+21x-6)
4x²+12x+9+14x²-4x+21x-6
18x²+29x+3
factoriser : (2x+3)²+(2x+3)(7x-2)
(2x+3)(2x+3)+(7x-2)
(2x+3)(9x+1)
x=-4
(-8+3)²+(-8+3)(-28-2)
(-5)²+(-5)(-30)
25+150=175
donc x = 175
0 votes
Thanks 1
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Je pense le reste est bon !
(4x²+12x+9)+(14x²-4x+21x-6)
4x²+12x+9+14x²-4x+21x-6
18x²+29x+3
factoriser : (2x+3)²+(2x+3)(7x-2)
(2x+3)(2x+3)+(7x-2)
(2x+3)(9x+1)
x=-4
(-8+3)²+(-8+3)(-28-2)
(-5)²+(-5)(-30)
25+150=175
donc x = 175