Réponse :
=(10y²-4y+10y-4) - (10y²-5y+2y-1)
= (10y²+6y-4 -10y²+3y+1)
=9y-3
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Réponse :
=(10y²-4y+10y-4) - (10y²-5y+2y-1)
= (10y²+6y-4 -10y²+3y+1)
=9y-3