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Sagot :

IBRAHIMHAJAR57

Réponse :   (*)signifie <<multiplier par>>

1) D=3*x+3*7-2*x+1*x-8

     =3x+21-2x+1x-8

     =3x-2x+1x+21-8

     =6x+29

     =6*0+29

     =0*29

     =0

   E= -6*x+-6*2-2*x-4*5*x-1

     = -6x+-12-2x-20x-1

     = -6x-6x-20x+-12-1

     = 0x-20x+-11

     = -20x+-11

     = -20*0+-11

     = 0+-11

     = -11

   F= x+1*x-1+-3*x+10

     = x+1x-1+-3x+10

     = x+1x+-3x-1+10

     = 2x+-3x-1+10

     = 1x-11

     = 1*2-11

     = 2-11

     = -9

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