Factoriser chaque expression: a) (y+9)x(y+6)+y+9 b) (2y-5)^2 + 2y-5
Mathématiques
Sarouuuush
Question
Factoriser chaque expression:
a) (y+9)x(y+6)+y+9
b) (2y-5)^2 + 2y-5
a) (y+9)x(y+6)+y+9
b) (2y-5)^2 + 2y-5
1 Réponse
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1. Réponse droopette
a)(y+9)(y+6)+y+9
=(y+9)(y+6)+(y+9)
=(y+9)(y+6+1)
=(y+9)(y+7)
b)(2y-5)² + 2y-5
=(2y-5)(2y-5)+(2y-5)
=(2y-5)(2y-5+1)
=(2y-5)(2y-4)
=2(2y-5)(y-2)