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nilsu6491
@nilsu6491
October 2020
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Bonjour, je suis en 1ére et en math on fait trinôme de degré 2. Et en cours la prof nous a demandé;
(3x-4)^2-9x^2
Et quand elle a corrigé elle a fait
(3x-4)^2-9x^2
= 9x^2-25x+16-9x^2
=-25x+16
Je comprend pas d'ou viens le -25x
Je vous demande l'expliquation. Merci d'avance.
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Bonjour, pouvez-vous m'aider svp je comprend rien de tt, merci d'avance.. 1,2,3
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