if u check for the maximum power of x that u'll get it comes out to b 625 to obtain 615 u have to omit some powers of x while mutiplying the brackets.
u'll have 2 remove (1,9) and (3,7) powers while actually multiplying the term along them.......
this gives 1*9+3*7=30
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
133
