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Sagot :

BIJOU3
A= (x-1) + [( 2x^2 + 10x - 3x - 15)]
  =  x-1 + 2x^2 + 7x - 15
  = 2x^2 + 8x -14

B = (x^2 - 4x + 3x - 12) - 3x + 6
   = x^2 - 4x - 12

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