Réponse:
a . (x+2)(x-3) -(x+2)^2
(x+2)[(x-3)-(x+2)]
(x+2 )[(x-3-x-2)]
(x+2)(-5)
= -5(x+2)
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Réponse:
a . (x+2)(x-3) -(x+2)^2
(x+2)[(x-3)-(x+2)]
(x+2 )[(x-3-x-2)]
(x+2)(-5)
= -5(x+2)