Factoriser (3y-5)(2y+1)+(y-7)(15-9y)
Mathématiques
inconnuR
Question
Factoriser (3y-5)(2y+1)+(y-7)(15-9y)
1 Réponse
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1. Réponse Anonyme
Factoriser (3y-5)(2y+1)+(y-7)(15-9y)
=(3y-5)(2y+1)+3(y-7)(5-3y)
=(3y-5)(2y+1-3(y-7))
=(3y-5)(-y+22)