Bonjour,
(4x+5)(2x-6)+(-3x+1)(4-2x)+2(18x+3)
= 8x²-24x+10x-30-12x+6x²+4-2x+36x+6
= 14x²+8x-20
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Bonjour,
(4x+5)(2x-6)+(-3x+1)(4-2x)+2(18x+3)
= 8x²-24x+10x-30-12x+6x²+4-2x+36x+6
= 14x²+8x-20