bonsoir,

jai besoin d aide pour mon exercice que je n arrive pas a faire

1) devlopper et réduire :

a=2×(x-4)
b=(2x-3)(3x-2)
c=(x+3)²
d=(2x-5)²
e=(x+7)(x-7)


2) factoriser:

f=x²-3x
g=4x-8y
h=x²-25



merci beaucoup d’ avance​
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