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Sagot :

Réponse:

1)

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

E= 2x*2+3x-4x-6-3x+6

E= 2x*2-4x

2)

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

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

E= 2x (x-2)

F= x (x-2)

F= 2 [x (x-2)]

F= 2x (x-2)

donc E= 2F

3)

(x-2)(2x+3)-3 (x-2) = 0

x= -2 et x= -3/2 et x= 2

d'où S {-2. -3/2. 2 }

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