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Sagot :

reponse :
1 - A= 6x-15+3x-7
= 9x-15-7
=9x-22
B= -5x(-3x+2)-4(-3x+2)
= -15^2+10x+4+12x-8
= -15x^2+22x-8
2- C= 7(3x-2)
D= x(5x-3)

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