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CocoB
@CocoB
April 2019
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Bonjour, j'ai un dm de maths a rendre demain et j'arrive pas a un exercice.
Merci de répondre le plus vite possible..
On considère
l'expression:
D=(3x-6)(2x-4)-(2x-4)²
A. Développe et réduis D.
B. Factorise D.
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telephone16
D = (3x-6)(2x-4)-(2x-4)²
(6x² -12x +12x +24) -( 4x² -16x +16)
6x² +24- 4x² +16x -16
+2x² +8 +16x
Factorisation
(3x-6)(
2x-4)
-
(2x-4
)(2x-4)
(2x-4)(3x-6-2x+4)
(2x-4)(x -2)
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(6x² -12x +12x +24) -( 4x² -16x +16)
6x² +24- 4x² +16x -16
+2x² +8 +16x
Factorisation
(3x-6)(2x-4)-(2x-4)(2x-4)
(2x-4)(3x-6-2x+4)
(2x-4)(x -2)