Exercice 2 : Développer et réduire les expressions suivantes : A=( 5x+3)( 5x – 3)
B=( 8x + 1)2
C=(x - 2)2
D= ( 4x - 7)(2x - 5)
E = (3x-2)(6x + 7) + (2x - 72
F = (x +9)2-( 2x + 7)( 3x + 8 )


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