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Exercice n°3:
Factoriser:
A = 4xcarré - 6x
B = (x + 2) (x+1) + (x+ 2) (7x-5)
C = (3x + 2)carré – (x + 5)(3x + 2)
D = 25xcarré - 1
E = (3x - 2)carré – (4x + 1)carré

Sagot :

Réponse:

B=(7x-5)+(x+2)+(×+1)