Factor
2y^4+y^2-10y+5
Please help!thank you
Ya got me. I don't find any rational roots at all. Makes factoring kinda tricky. You sure it's not
2y^4-y^3-10y+5 ?
That could be done by grouping
y^2(2y-1) - 5(2y-1)
(y^2-5)(2y-1)
For your function as given, I don't see any way. Wolframalpha confirms this:
http://www.wolframalpha.com/input/?i=2y^4%2By^2-10y%2B5