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Exercice 4 : Calcul littéral
A l'aide d'une identité remarquable factoriser au maximum :
A = (3x - 2)2 – (x + 3)2



B = 25 + 25x2 – 50x

Sagot :

LEAURATZ

A = (3x - 2)2 – (x + 3)2

A= 2(3x-2-(x+3))

A= 2(3x-2-x-3)

A= 2(2x-5)

A= 4x-10

B = 25 + 25x2 – 50x

B= [tex](5-5x)^{2}[/tex]

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