factorising

Factual Questions
1

how do factorise the equation:

    y = ax^4 + bx^3 + cx^2 + dx + e

a quick and easy method would be preferable

2

There isn’t a quick and easy method. Check

http://www.mathforum.com/dr.math/faq/faq.cubic.equations.html

By the way, there is no method for degree 5 and higher.