Exercice 2 : Développer et réduire les expressions :
a
A=21-5x+4) ou 2 x (-5r+4)
B=-3x (7x-2)
C=-7(5x+2)
D=2( 3x +4)+5(1-2x)
E=2;( 4x+5)-8(x-3)
Pouvez vous m’aider svpp
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