Aidez moi s'il vous plait : Il faut factoriser les expressions en détaillant les calculs
Exemple :
A= (2x-5) (3x-9)
= 2x × 3x -2x × 9-5 × 3x + 5x9
= 6x²- 18x- 15x + 45
= 6x²-33x + 45
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