April 2019 1 23 Report

Factorisez l'expression A(x), puis déterminez le signe de A(x) suivant les valeurs de x.

a) A(x)=(x+2)²-16

b) A(x)=(2x+3)²-(x-1)²

c) A(x)=x²-2x

d) A(x)=(x+1)-x(x+1)

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