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Mignon80
@Mignon80
May 2019
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Aider moi svp je n'y arrivée pas du tout
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Mytrololo
Bonsoir,
Ex5
1) 3(2+a)-(6-3a)+4(1-2a)
6+3a -6+3a+4-8a
= -2a+4
2) (2a+3)(1-3a)+3(3+2a)
2a-6a²+3-9a+9+6a
=-6a²-a+12
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Thanks 1
Leazephyr
Bonjour, 1) 6+3a+6+3a+4-8a = 16-2a. 2) 2a-6a (carré)+3-9a+9+6 a = -a-6a (carré)+12 Voilà
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Leazephyr
pour le 1, c'est -2a+4 pardon
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Ex5
1) 3(2+a)-(6-3a)+4(1-2a)
6+3a -6+3a+4-8a
= -2a+4
2) (2a+3)(1-3a)+3(3+2a)
2a-6a²+3-9a+9+6a
=-6a²-a+12