Bonjour, besoin d’aide

Exercice 8: Factoriser les expressions suivantes

E= 4a+8b
F= 7xy-4y
G= 3y'3+2y
H= 4x(x+2)+3(x+2)
I= -3(y+6)
J= (x+1)×(5x+4)+(3+x)(x+1)
K= (3y-2)(y+5)-(y+5)(y-5)
L= (5x+3'2+(5x+3)(2x-1)


Exercice 10: On donne S = (2y + 1)(y + 1)-(2y + 1)(3y-5)

a) Développer et réduire S.
b) Factoriser S. c) Calculer S pour y = 5, puis y = -3.

Merci.​
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