A=(3x+4)(x+3)-(x+3)²
Mathématiques
LaurineG
Question
A=(3x+4)(x+3)-(x+3)²
2 Réponse
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1. Réponse droopette
A=(3x+4)(x+3)-(x+3)²
=3x²+9x+4x+12-(x²+6x+9)
=3x²+13x+12-x²-6x-9
=2x²+7x+3 -
2. Réponse Anonyme
A=(3x+4)(x+3)-(x+3)²
=(x+3)(3x+4-x-3)
=(x+3)(2x+1)