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Sagot :

A = 7-2x(4x-1)
A= 7-8x^2 + 2x

B= (2x+2)(2x-2) - (x+3)
B=4x^2-4x+4x-4-x+3
B= 4x^2-x-1

C = 8-x-(-2x+5)
C=8-x+2x-5
C=3+x

D=(-5*3x)(x*4)
D=-15x*4x
D=60x^2

E=(5x+8)2
E=10x+16

F=(2x-3)(5x-1)+8
F=10x^2-2x-15x+3+8
F=10x^2-17x+11

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