A=9-3x(4x-5)-(6x-7)(2x-3)-(x² 8x-11)
Mathématiques
loloeric31313
Question
A=9-3x(4x-5)-(6x-7)(2x-3)-(x² 8x-11)
1 Réponse
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1. Réponse blondinetteoceane88
A=9-3x(4x-5)-(6x-7)(2x-3)-(x²+8x-11)
A=9-12x²+15x-(12x²-18x-14x+21)-x²-8x+11
A=9-12x²+15x-12x²+18x+14x-21-x²-8x+11
A=-12x²-12x²-x²+15x+18x+14x-8x+9-21+11
A=-25x²39x-1