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5
Factorise les expressions suivantes :
A = (x + 3) (x + 5) – 3 (x + 5);
B = (2 x + 3) (x – 4) + (3 x – 5) (x - 4);
C = (3 x - 1) (x - 2) - (2 x + 5) (3 x - 1);
IN
D= x (2 x + 3) - 7 (2 x + 3).
Pense à entourer
le facteur
commun !
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