Répondre :

A = (5x-4)(5x-4)-(2x-2)

= (5x-4)(5x-4-2x+2)

= (5x-4)(3x-2)

chou54

A = (5x - 4)² - (5x - 4)(2x - 2)

   = (5x - 4) [(5x - 4) - (2x - 2)]

   = (5x - 4) (5x - 4 - 2x + 2)

   = (5x - 4)(3x - 2)

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