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Développer, réduire chaque expression;

x c'est le ixe pour ceux ki ne savent pas :/

Exercice 1:

a) (x+5)(x-5) b) (3+x)(3-x) c) (x-8)(x+8) d) (a-4)(a+4)

Exercie 2:

a) (3+1)(3-1) b) (4-7x)(4+7x) c) (2x+5)(2x-5) d) (5+2x)(5-2x)

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