EXERCICE 3 factoriser les expression (non exigible)
X=fois
x=lettre
A=(x-3)(x-2)+5(x-3)
B=3(5-9x)-(5-9x)(1-3x)
C=(2x-5)(7x+5)-(2x- 5²)


Exercice 4 factoriser les expression (non exigible)
A=4(x-2) - (x-2) (3x+1)
B=5-9x+(5-9x (1-3x)
C= (3x-7) - (1-2x) (3x-7)