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Sagot :

3(2x-2)(9+4x)-(x-1)(-2x+3)
(6x-6)(9+4x)-(x-1)(-2x+3)
(54x+24x²-54-24x)-(-2x²+3x+2x-3)
54x+24x²-54-24x+2x²-3x-2x+3)
26x²+25x-51

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