Mathématiques

Question

Factoriser D(x)=(3x-4)^2 -4(5x-1)^2

1 Réponse

  • (3x - 4)² - 4(5x - 1)²
    = (3x - 4 - 4(5x - 1))(3x - 1 + 5x - 1)
    = (3x - 4 - 20x + 4)(8x - 2)
    = - 17x(8x - 2)

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