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Sagot :

Salut

a) non car (x+3)2 - 3 = 2x+6-3 = 2x+3

b) oui car x(-4)+x = -4x+x = -3x

c) non car x²-x

d) oui car  (x-5)6 + 30 = 6x-30+30 = 6x

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