B = (4x - 3)(2-5x)-(9x +7)(6-x)
Mathématiques
harutyunyanmel
Question
B = (4x - 3)(2-5x)-(9x +7)(6-x)
1 Réponse
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1. Réponse ssaaddia
B = (4x - 3)(2-5x)-(9x +7)(6-x)
4x.2-4x.5x-3.2+3.5x-(9x.6-9x.x+7.6-7x)
8x-20x²-6+15x-(45x-9x²+42-7x)
8x-20x²-6+15x-(38x-9x²+42)
23x-20x²-6-38x+9x²-42
23x-38x-20x²+9x²-6-42
-15x-11x²-48