Bonjour,
(y+4)²-(y+4)(-y+3)=(y+4)(y+4-(y+3))
=(y+4)(y+4+y-3)
=(y+4)(2y+1)
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Bonjour,
(y+4)²-(y+4)(-y+3)=(y+4)(y+4-(y+3))
=(y+4)(y+4+y-3)
=(y+4)(2y+1)
Verified answer
(y+4)² = (y+4)(y+4)Après, c'est comme indiqué dans le cours :
A = (y+4)(y+4)-(y+4)(-y+3)
On met (y+4) en facteur :
A = (y+4)[(y+4)-(-y+3)]
A = (y+4)[y+4+y-3]
A = (y+4)(2y+1)