D=-3x²-6+x²-4x+2x-8 =-2x²-2x-14
E =5x²-3x+45x-27-8x+20 = 5x²-34x-7
Réponse :
D=-3(x²+2)+(x+2)(x-4)
D =-3x²-6+x²-4x+2x-8
D = -2x²-14-2x
/E=(x+9)(5x-3)-4(2x-5)
E = 5x²-3x+45x-27-8x+20
E = 5x²+34x-7
Explications étape par étape :
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D=-3x²-6+x²-4x+2x-8 =-2x²-2x-14
E =5x²-3x+45x-27-8x+20 = 5x²-34x-7
Réponse :
D=-3(x²+2)+(x+2)(x-4)
D =-3x²-6+x²-4x+2x-8
D = -2x²-14-2x
/E=(x+9)(5x-3)-4(2x-5)
E = 5x²-3x+45x-27-8x+20
E = 5x²+34x-7
Explications étape par étape :