Mathématiques

Question

N= (4-3a) X (a-5) + 15a

S= (5+x) X (x+4) + 3x (1-2x)

1 Réponse

  • N= (4-3a)(a-5) + 15a
    N = 4a-3a²-20+15a+15a
    N = -3a² + 34a -20

    S= (5+x)(x+4) + 3x(1-2x)
    S = 5x+x²+20+4x +3x-6x²
    S = -5x² +12x +20

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