Répondre :
Bonjour
♧ Factoriser :
A = (5x-2)² - 4(x+1)(5x-2)
A = (5x-2)[ (5x-2)-4(x+1) ]
A = (5x-2) (5x-2-4x-4)
A= (5x-2)(x-6)
Voilà ^^
♧ Factoriser :
A = (5x-2)² - 4(x+1)(5x-2)
A = (5x-2)[ (5x-2)-4(x+1) ]
A = (5x-2) (5x-2-4x-4)
A= (5x-2)(x-6)
Voilà ^^