Sagot :
Bonjour,
(8 - 3y)(y + 5) + (8 - 3y)(y +6)
= (8-3y)[(y+5)+(y+6)]
= (8-3y)(2y+11)
2y(y-3)+14(y-3)
= (y-3)(2y+14)
= 2(y-3)(y+7)
y²(8-3y)+4(8-3y)
= (8-3y)(y²+4)
-y(y-3)-y+3
= -y(y-3)-(y-3)
= -y(y-3)-1(y-3)
= (y-3)(-y-1)
= -(y-3)(y+1)
Bonjour,
(8 - 3y)(y + 5) + (8 - 3y)(y +6)
= (8-3y)[(y+5)+(y+6)]
= (8-3y)(2y+11)
2y(y-3)+14(y-3)
= (y-3)(2y+14)
= 2(y-3)(y+7)
y²(8-3y)+4(8-3y)
= (8-3y)(y²+4)
-y(y-3)-y+3
= -y(y-3)-(y-3)
= -y(y-3)-1(y-3)
= (y-3)(-y-1)
= -(y-3)(y+1)